existential quantifier

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun logic The operator, represented by the symbol ∃, used in predicate calculus to indicate that a predicate is true for at least one member of a specified set.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a logical quantifier of a proposition that asserts the existence of at least one thing for which the proposition is true