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def·i·ni·tion/ˌdefəˈniSHən/

Noun:

A statement of the exact meaning of a word, esp. in a dictionary. An exact statement or description of the nature, scope, or meaning of something.

de·fine

  [dih-fahyn] verb -fined, -fin·ing.

verb (used with object)

1.

to state or set forth the meaning of (a word, phrase, etc.): They disagreed on how to define.

2.

to explain or identify the nature or essential qualities of;describe: to define functions.

de·fine

de·finedde·fin·ing

1

a : to determine or identify the essential qualities or meaning of (whatever defines us as human)b : to discover and set forth the meaning of (as a word)