determiner Meaning, Definition & Usage

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

WordNet

De*ter"min*er noun
Definitions
  1. One who, or that which, determines or decides.

Webster 1913