define vs definition

define is not a noun while definition is a noun.

Word	Noun	Adjective	Verb	Adverb
define	No	No	Yes	No
definition	Yes	No	No	No

define (noun)	definition (noun)
	clarity of outline
	a concise explanation of the meaning of a word or phrase or symbol

define (verb)	definition (verb)
give a definition for the meaning of a word
decide upon or fix definitely
determine the essential quality of
determine the nature of
show the form or outline of