Real Dictionary

quantifier
countable noun: In grammar, a quantifier is a word or phrase such as ' plenty' or 'a lot' which you use to refer to a quantity of something without being precise. It is often followed by 'of', as in 'a lot of money'.

quantifier in American English
a word, term, prefix, symbol, etc. that quantifies
noun: an expression, as “all” or “some,” that indicates the quantity of a proposition

quantifier in British English
noun: a symbol including a variable that indicates the degree of generality of the expression in which that variable occurs, as (∃ x) in (∃x) Fx, rendered "something is an F", (x) in (x)(Fx→Gx), rendered "all Fs are Gs"