1.  determinative(n = noun.communication) determiner - one of a limited class of noun modifiers that determine the referents of noun phrases;
is a kind of closed-class word, function word
has particulars: article

2.  determinative(n = noun.cognition) causal factor, determinant, determiner, determining factor - a determining or causal element or factor; "education is an important determinant of one's outlook on life"
is a kind of cognitive factor
has particulars: clincher, decisive factor, influence
Derived form adjective determinative₁

   determinative(s = adj.all) deciding, determinant, determining - having the power or quality of deciding; "the crucial experiment"; "cast the deciding vote"; "the determinative (or determinant) battle"
Derived form noun determinative₂

determinative, adj. & n.
--adj. serving to define, qualify, or direct.
--n. a determinative thing or circumstance.

Derivative:
determinatively adv.

Etymology:
F d{eacute}terminatif -ive (as DETERMINE)