| 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" |