From Teflpedia

A definition (/ˌde.fə'nɪ.ʃən/) is a statement of the exact meaning of a word, especially in a dictionary or glossary. Thesauruses and encylopedias usually have entries rather than definitions, but they’re the same basic idea.

A dictionary definition usually includes:

  • Details of the word class.
  • A pronunciation guide, often written in IPA.
  • A description of the meaning(s) of the word.

It may also include some or all of the following:

Understanding such entries is an important skill for students to master.