'Determiner' definitions:

Definition of 'determiner'

From: WordNet
noun
An argument that is conclusive [syn: clincher, determiner, determining factor]
noun
One of a limited class of noun modifiers that determine the referents of noun phrases [syn: determiner, determinative]
noun
A determining or causal element or factor; "education is an important determinant of one's outlook on life" [syn: determinant, determiner, determinative, determining factor, causal factor]

Definition of 'Determiner'

From: GCIDE
  • Determiner \De*ter"min*er\, n. One who, or that which, determines or decides. [1913 Webster]