Meaning of BOOLEAN in English
[Bool.ean] adj [George Boole d. 1864 Eng. mathematician] (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) "~ expression" "~ search strategy for information retrieval"
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012