Determiner

n.

1.

One who, or that which, determines or decides.

Noun	1.	determiner - an argument that is conclusive Synonyms: clincher, determining factor
	2.	determiner - one of a limited class of noun modifiers that determine the referents of noun phrases Synonyms: determinative
	3.	determiner - a determining or causal element or factor; "education is an important determinant of one's outlook on life" Synonyms: causal factor, determinant, determining factor, determinative

argument, clincher, determine, determining factor, settle, square off, square up, statement