Logic To limit the variables of (a proposition) by prefixing an operator such as all or some.
[Medieval Latin quantificāre : Latin quantus, how great; see quantity + Latin -ficāre, -fy.] quan'ti·fi'a·ble adj., quan'ti·fi·ca'tion (-fĭ-kā'shən) n.
c.1840, as a term in logic, from M.L. quantificare, from L. quantus "how much" + facere "to make" (see factitious). Lit. sense of "determine the quantity of, measure" is from 1878.