To get the definition of another word, try using Wiktionary For other uses of the word “definition” itself, see Definition (disambiguation) A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). The term to be defined is the definiendum. The term may have many different senses and multiple meanings. For each meaning, a definiens is a cluster of words that defines that term (and clarifies the speaker’s intention). A definition will vary in aspects like precision or popularity. There are also different types of definitions with different purposes and focuses (e.g. intensional, extensional, descriptive, stipulative, and so on). A chief difficulty in the management of definitions is the necessity of using other terms that are already understood or whose definitions are easily obtainable or demonstrable (e.g. a need, sometimes, for ostensive definitions). A dictionary definition typically contains additional details about a word, such as an etymology and the language or languages of its origin, or obsolete meanings.