Meaning of “quantifier” - Learner’s Dictionary

quantifier

noun [ C ] uk us /ˈkwɒntɪfaɪər/

a word or group of words that is used before a noun to show an amount of that noun. For example the words 'many', 'some', and 'a lot of' are quantifiers.

(Definition of “quantifier” from the Cambridge Learner’s Dictionary © Cambridge University Press)