a definition for the word thesis

While Sandel argues that pursuing perfection through genetic engineering would decrease our sense of humility, he claims that the sense of solidarity we would lose is also important.

This thesis summarizes several points in Sandel’s argument, but it does not make a claim about how we should understand his argument. A reader who read Sandel’s argument would not also need to read an essay based on this descriptive thesis.  

Broad thesis (arguable, but difficult to support with evidence) 

Michael Sandel’s arguments about genetic engineering do not take into consideration all the relevant issues.

This is an arguable claim because it would be possible to argue against it by saying that Michael Sandel’s arguments do take all of the relevant issues into consideration. But the claim is too broad. Because the thesis does not specify which “issues” it is focused on—or why it matters if they are considered—readers won’t know what the rest of the essay will argue, and the writer won’t know what to focus on. If there is a particular issue that Sandel does not address, then a more specific version of the thesis would include that issue—hand an explanation of why it is important.  

Arguable thesis with analytical claim 

While Sandel argues persuasively that our instinct to “remake” (54) ourselves into something ever more perfect is a problem, his belief that we can always draw a line between what is medically necessary and what makes us simply “better than well” (51) is less convincing.

This is an arguable analytical claim. To argue for this claim, the essay writer will need to show how evidence from the article itself points to this interpretation. It’s also a reasonable scope for a thesis because it can be supported with evidence available in the text and is neither too broad nor too narrow.  

Arguable thesis with normative claim 

Given Sandel’s argument against genetic enhancement, we should not allow parents to decide on using Human Growth Hormone for their children.

This thesis tells us what we should do about a particular issue discussed in Sandel’s article, but it does not tell us how we should understand Sandel’s argument.  

Questions to ask about your thesis 

• Is the thesis truly arguable? Does it speak to a genuine dilemma in the source, or would most readers automatically agree with it?  
• Is the thesis too obvious? Again, would most or all readers agree with it without needing to see your argument?  
• Is the thesis complex enough to require a whole essay's worth of argument?  
• Is the thesis supportable with evidence from the text rather than with generalizations or outside research?  
• Would anyone want to read a paper in which this thesis was developed? That is, can you explain what this paper is adding to our understanding of a problem, question, or topic?
• picture_as_pdf Thesis

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Definition of thesis noun from the Oxford Advanced American Dictionary

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Definition of thesis – Learner’s Dictionary

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thesis noun [C] ( WRITING )

Thesis noun [c] ( idea ).

(Definition of thesis from the Cambridge Learner's Dictionary © Cambridge University Press)

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Definition of 'thesis'

Video: pronunciation of thesis

thesis in American English

Thesis in british english, examples of 'thesis' in a sentence thesis, related word partners thesis, trends of thesis.

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In other languages thesis

• American English : thesis / ˈθisɪs /
• Brazilian Portuguese : tese
• Chinese : 论点
• European Spanish : tesis
• French : thèse
• German : These
• Italian : tesi
• Japanese : 主張
• Korean : 논지
• European Portuguese : tese
• Spanish : tesis
• Thai : ข้อสมมุติ, ข้อวินิจฉัย

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Thesis Statements

What this handout is about.

This handout describes what a thesis statement is, how thesis statements work in your writing, and how you can craft or refine one for your draft.

Introduction

Writing in college often takes the form of persuasion—convincing others that you have an interesting, logical point of view on the subject you are studying. Persuasion is a skill you practice regularly in your daily life. You persuade your roommate to clean up, your parents to let you borrow the car, your friend to vote for your favorite candidate or policy. In college, course assignments often ask you to make a persuasive case in writing. You are asked to convince your reader of your point of view. This form of persuasion, often called academic argument, follows a predictable pattern in writing. After a brief introduction of your topic, you state your point of view on the topic directly and often in one sentence. This sentence is the thesis statement, and it serves as a summary of the argument you’ll make in the rest of your paper.

What is a thesis statement?

A thesis statement:

• tells the reader how you will interpret the significance of the subject matter under discussion.
• is a road map for the paper; in other words, it tells the reader what to expect from the rest of the paper.
• directly answers the question asked of you. A thesis is an interpretation of a question or subject, not the subject itself. The subject, or topic, of an essay might be World War II or Moby Dick; a thesis must then offer a way to understand the war or the novel.
• makes a claim that others might dispute.
• is usually a single sentence near the beginning of your paper (most often, at the end of the first paragraph) that presents your argument to the reader. The rest of the paper, the body of the essay, gathers and organizes evidence that will persuade the reader of the logic of your interpretation.

If your assignment asks you to take a position or develop a claim about a subject, you may need to convey that position or claim in a thesis statement near the beginning of your draft. The assignment may not explicitly state that you need a thesis statement because your instructor may assume you will include one. When in doubt, ask your instructor if the assignment requires a thesis statement. When an assignment asks you to analyze, to interpret, to compare and contrast, to demonstrate cause and effect, or to take a stand on an issue, it is likely that you are being asked to develop a thesis and to support it persuasively. (Check out our handout on understanding assignments for more information.)

How do I create a thesis?

A thesis is the result of a lengthy thinking process. Formulating a thesis is not the first thing you do after reading an essay assignment. Before you develop an argument on any topic, you have to collect and organize evidence, look for possible relationships between known facts (such as surprising contrasts or similarities), and think about the significance of these relationships. Once you do this thinking, you will probably have a “working thesis” that presents a basic or main idea and an argument that you think you can support with evidence. Both the argument and your thesis are likely to need adjustment along the way.

Writers use all kinds of techniques to stimulate their thinking and to help them clarify relationships or comprehend the broader significance of a topic and arrive at a thesis statement. For more ideas on how to get started, see our handout on brainstorming .

How do I know if my thesis is strong?

If there’s time, run it by your instructor or make an appointment at the Writing Center to get some feedback. Even if you do not have time to get advice elsewhere, you can do some thesis evaluation of your own. When reviewing your first draft and its working thesis, ask yourself the following :

• Do I answer the question? Re-reading the question prompt after constructing a working thesis can help you fix an argument that misses the focus of the question. If the prompt isn’t phrased as a question, try to rephrase it. For example, “Discuss the effect of X on Y” can be rephrased as “What is the effect of X on Y?”
• Have I taken a position that others might challenge or oppose? If your thesis simply states facts that no one would, or even could, disagree with, it’s possible that you are simply providing a summary, rather than making an argument.
• Is my thesis statement specific enough? Thesis statements that are too vague often do not have a strong argument. If your thesis contains words like “good” or “successful,” see if you could be more specific: why is something “good”; what specifically makes something “successful”?
• Does my thesis pass the “So what?” test? If a reader’s first response is likely to  be “So what?” then you need to clarify, to forge a relationship, or to connect to a larger issue.
• Does my essay support my thesis specifically and without wandering? If your thesis and the body of your essay do not seem to go together, one of them has to change. It’s okay to change your working thesis to reflect things you have figured out in the course of writing your paper. Remember, always reassess and revise your writing as necessary.
• Does my thesis pass the “how and why?” test? If a reader’s first response is “how?” or “why?” your thesis may be too open-ended and lack guidance for the reader. See what you can add to give the reader a better take on your position right from the beginning.

Suppose you are taking a course on contemporary communication, and the instructor hands out the following essay assignment: “Discuss the impact of social media on public awareness.” Looking back at your notes, you might start with this working thesis:

Social media impacts public awareness in both positive and negative ways.

You can use the questions above to help you revise this general statement into a stronger thesis.

• Do I answer the question? You can analyze this if you rephrase “discuss the impact” as “what is the impact?” This way, you can see that you’ve answered the question only very generally with the vague “positive and negative ways.”
• Have I taken a position that others might challenge or oppose? Not likely. Only people who maintain that social media has a solely positive or solely negative impact could disagree.
• Is my thesis statement specific enough? No. What are the positive effects? What are the negative effects?
• Does my thesis pass the “how and why?” test? No. Why are they positive? How are they positive? What are their causes? Why are they negative? How are they negative? What are their causes?
• Does my thesis pass the “So what?” test? No. Why should anyone care about the positive and/or negative impact of social media?

After thinking about your answers to these questions, you decide to focus on the one impact you feel strongly about and have strong evidence for:

Because not every voice on social media is reliable, people have become much more critical consumers of information, and thus, more informed voters.

This version is a much stronger thesis! It answers the question, takes a specific position that others can challenge, and it gives a sense of why it matters.

Let’s try another. Suppose your literature professor hands out the following assignment in a class on the American novel: Write an analysis of some aspect of Mark Twain’s novel Huckleberry Finn. “This will be easy,” you think. “I loved Huckleberry Finn!” You grab a pad of paper and write:

Mark Twain’s Huckleberry Finn is a great American novel.

You begin to analyze your thesis:

• Do I answer the question? No. The prompt asks you to analyze some aspect of the novel. Your working thesis is a statement of general appreciation for the entire novel.

Think about aspects of the novel that are important to its structure or meaning—for example, the role of storytelling, the contrasting scenes between the shore and the river, or the relationships between adults and children. Now you write:

In Huckleberry Finn, Mark Twain develops a contrast between life on the river and life on the shore.

• Do I answer the question? Yes!
• Have I taken a position that others might challenge or oppose? Not really. This contrast is well-known and accepted.
• Is my thesis statement specific enough? It’s getting there–you have highlighted an important aspect of the novel for investigation. However, it’s still not clear what your analysis will reveal.
• Does my thesis pass the “how and why?” test? Not yet. Compare scenes from the book and see what you discover. Free write, make lists, jot down Huck’s actions and reactions and anything else that seems interesting.
• Does my thesis pass the “So what?” test? What’s the point of this contrast? What does it signify?”

After examining the evidence and considering your own insights, you write:

Through its contrasting river and shore scenes, Twain’s Huckleberry Finn suggests that to find the true expression of American democratic ideals, one must leave “civilized” society and go back to nature.

This final thesis statement presents an interpretation of a literary work based on an analysis of its content. Of course, for the essay itself to be successful, you must now present evidence from the novel that will convince the reader of your interpretation.

Works consulted

We consulted these works while writing this handout. This is not a comprehensive list of resources on the handout’s topic, and we encourage you to do your own research to find additional publications. Please do not use this list as a model for the format of your own reference list, as it may not match the citation style you are using. For guidance on formatting citations, please see the UNC Libraries citation tutorial . We revise these tips periodically and welcome feedback.

Anson, Chris M., and Robert A. Schwegler. 2010. The Longman Handbook for Writers and Readers , 6th ed. New York: Longman.

Lunsford, Andrea A. 2015. The St. Martin’s Handbook , 8th ed. Boston: Bedford/St Martin’s.

Ramage, John D., John C. Bean, and June Johnson. 2018. The Allyn & Bacon Guide to Writing , 8th ed. New York: Pearson.

Ruszkiewicz, John J., Christy Friend, Daniel Seward, and Maxine Hairston. 2010. The Scott, Foresman Handbook for Writers , 9th ed. Boston: Pearson Education.

You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill

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Thesis Definition

The thesis is one of the most important concepts in college expository writing. A thesis sentence focuses your ideas for the paper; it's your argument or insight or viewpoint crystallized into a single sentence that gives the reader your main idea. It's not only useful for the reading audience to understand the purpose of the essay; this purpose is also useful for you as a writer, as it indicates the type of support that will follow in the paper and may indicate a logical structure or order for that support. Thus, you need to have a good grasp of the concept of thesis in order to proceed.

The thesis identifies two basics:

• what your ideas are about, and
• what your ideas are (i.e. what you will be trying to prove).

There are two parts to a thesis sentence that reflect these basics.

• The topic in the thesis tells what you are writing about.
• The angle in the thesis tells what your ideas are about the topic (again, what you are trying to prove).

For example:

• All successful college students have certain basic characteristics. [The main topic is about college students, while the idea or angle about the topic is that successful students share certain characteristics. The thesis indicates the type of support needed--discussion of those characteristics that contribute to college success.]
• For most adult students returning to college, the problems that they face along the way are outweighed by their achievements. [The main topic is about adult college students, while the idea or angle about the topic is that problems are outweighed by achievements. The thesis indicates the type of support needed and the order of that support--an explanation of the problems first and then an explanation of achievements second.]
• Adult students returning to college make up a higher percentage of entering students than they did twenty years ago because of a number of statistical, economic, and social reasons. [The main topic is about adult students returning to college, while the idea or angle about the topic is that there are reasons for the higher percentage of adults returning to college. The thesis indicates the type of support needed and the order of that support--an explanation of the statistical reasons first, economic reasons second, and social reasons third.]

Do you understand the basic topic and angle concept? If so, then there are a few more things to consider about the thesis. (And if not, now's the time to start asking a learning coach for assistance, so Email [email protected] ). It's important to investigate additional thesis characteristics at this point to make sure that you'll be creating a working thesis sentence that is workable and appropriate for college essays.  In addition to knowing what a thesis is, you need to know what a thesis is not. A thesis sentence's angle should NOT be:

• Too broad. For example, the following thesis really doesn't pinpoint a specific insight about the topic:  Adult students returning to college have a hard time. In what ways do adult students have a hard time? You'd need to identify a more specific insight in this angle.
• Too narrow a statement of fact. For example, the following thesis really cannot be developed into a full essay because the angle doesn't contain the writer's own thoughts or insights about the subject:  Adult students returning to college read an average of 7.5 books per term. A reader may respond by saying, "So what?" A narrow statement of fact does not contain your own personal analysis, argument, or interpretation of the topic--that all-important angle which a thesis must have.
• An announcement. For example, the following really is not a thesis at all because it lacks an angle that gives the writer's own insight into the topic: My topic is the adult student returning to college. Again, "So what?" What's the reader's idea here?

Once you create a working thesis, you should assess it to make sure that it fulfills thesis characteristics.  Make sure it has a clear topic (indication of what the thesis is about) and angle (what your own ideas are about the topic, i.e. what you are trying to prove). Make sure that the angle is not too broad, too narrow, a statement of fact, or an announcement. Work with the angle to make it indicate the order of your support, if you choose to do that for yourself or for your reading audience. And realize that the thesis is a working thesis until you finalize the essay (it's okay to revise the thesis as you go along, just as long as you retain important thesis characteristics.)

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Synonyms of thesis

• as in argument
• as in hypothesis
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Thesaurus Definition of thesis

Synonyms & Similar Words

• proposition
• speculation
• explanation
• presupposition
• supposition
• generalization
• presumption
• abstraction

Antonyms & Near Antonyms

Thesaurus Entries Near thesis

Cite this entry.

“Thesis.” Merriam-Webster.com Thesaurus , Merriam-Webster, https://www.merriam-webster.com/thesaurus/thesis. Accessed 24 Apr. 2024.

More from Merriam-Webster on thesis

Nglish: Translation of thesis for Spanish Speakers

Britannica English: Translation of thesis for Arabic Speakers

Britannica.com: Encyclopedia article about thesis

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