The core feature of a definition essay is that you are being tasked with defining a given word or concept. What is important to remember when writing a definition essay is that the definitions of words and concepts are not all universally agreed upon. While we all agree on what a dog is, we might disagree as to what another word or concept, for example genocide or racism means. Given that there are disagreements about the meanings of these words, writing a definition essay involves looking at these disagreements and making a case, based on a thesis and supporting evidence, for which definition of a given term or concept is the most appropriate.
Writing a definition essay not only means reciting the common definition of the word or concept that you are writing about. Rather, it involves exploring the complexity of the meaning that is associated with a given word or concept. It is not possible to write a good definition essay on a topic that is not associated with definitional controversy. Rather, and because the purpose of writing a definition essay is to determine which definition of a given concept or term is superior, writing a definition essays means that you should choose a concept or term that is the subject of disagreement and contestation.
In writing a definition essay, you must be able to break down the different components of the definition of the word that you are writing on. In so doing, you will be looking for disagreements regarding the definition of the concept in the scholarly literature and other sources. These disagreements might involve different elements of the word or concept. Taking the example of genocide discussed above, disagreements about its definition might emerge from the legal perspective, the ethical perspective, and the practical perspective. Writing a good definition essay means that you will explore definitional disagreements across multiple such areas of a term or concept.
Ultimately, writing a definition essay involves examining the competing definitions of a given word or concept so as to make an argument in favor of how the word or concept should best be defined. Writing a definition essay thus involves using your critical thinking skills so as to examine different versions of the definition of the word or concept and taking these into account in writing your definition essay. You will compare and contrast these definitions as you write a definition essay and your thesis will reflect which definition you believe to be superior and why.