determiner

noun

1. a person or thing that determines.
2. Grammar. a member of a subclass of English limiting adjectival words that usually precede descriptive adjectives and include the articles the, a, and an, and any words that may substitute for them, as your, their, some, and each.

noun

1. a word, such as a number, article, possessive adjective, etc, that determines (limits) the meaning of a noun phrase, e.g. their in `their black cat’
2. a person or thing that determines