1. Logic. an expression, as “all” or “some,” that indicates the quantity of a proposition.Compare existential quantifier, universal quantifier.
  2. a word, especially a modifier, that indicates the quantity of something.

Origin of quantifier

First recorded in 1875–80; quantify + -er1
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British Dictionary definitions for quantifiers


  1. logic
    1. 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)(FxGx), rendered "all Fs are Gs"
    2. any other symbol with an analogous interpretationthe existential quantifier, (∃ x ), corresponds to the words "there is something, x, such that …"
  2. grammar a word or phrase in a natural language having this role, such as some, all, or many in English
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012