narrow down

Thesaurus

Verb	1.	narrow down - define clearly; "I cannot narrow down the rules for this game" pin down, nail down, narrow, peg down, specify determine - fix in scope; fix the boundaries of; "the tree determines the border of the property" concretize - make something concrete
	2.	narrow down - become more focus on an area of activity or field of study; "She specializes in Near Eastern history" specialize, narrow, specialise vary, alter, change - become different in some particular way, without permanently losing one's or its former characteristics or essence; "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season" overspecialise, overspecialize - become overly specialized; "She overspecialized when she concentrated on verbs in Fijian"