Main Entry: Bool·ean

Pronunciation: \ˈbü-lē-ən\

Function: adjective

Etymology: George Boole †1864 English mathematician

Date: 1851

: of, relating to, or being a logical combinatorial system (as Boolean algebra) that represents symbolically relationships (as those implied by the logical operators AND, OR, and NOT) between entities (as sets, propositions, or on-off computer circuit elements) <Boolean expression> <Boolean search strategy for information retrieval>