define vs pick out

define and pick out both are verbs.

Word	Noun	Adjective	Verb	Adverb
define	No	No	Yes	No
pick out	No	No	Yes	No

As verbs, pick out is a hypernym of define; that is, pick out is a word with a broader meaning than define:

Other hypernyms of define include choose, select, take.

define (verb)	pick out (verb)
give a definition for the meaning of a word	pick out, select, or choose from a number of alternatives
decide upon or fix definitely	detect with the senses
determine the essential quality of
determine the nature of
show the form or outline of