1. (语法中的)限定词
In grammar, a determiner is a word which is used at the beginning of a noun group to indicate, for example, which thing you are referring to or whether you are referring to one thing or several. Common English determiners are 'a', 'the', 'some', 'this', and 'each'.

noun

1. a determining or causal element or factor

e.g. education is an important determinant of one's outlook on life

Synonym: determinantdeterminativedetermining factorcausal factor

2. one of a limited class of noun modifiers that determine the referents of noun phrases

Synonym: determinative

3. an argument that is conclusive

Synonym: clincherdetermining factor