select vs define

select is an adjective but define is not an adjective.

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

As verbs, define is a hyponym of select; that is, define is a word with a more specific, narrower meaning than select:

select (adjective)	define (adjective)
selected or chosen for special qualifications
of superior grade

select (verb)	define (verb)
pick out, select, or choose from a number of alternatives	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