boolean

adjective

pertaining to or being a deductive logical system, as Boolean algebra, used to represent symbolically the relationships between sets, classes, and other entities.
Computers. of or relating to a data type having two possible values representing “true” or “false.”

noun

adj.

in reference to abstract algebraic systems, 1851, named for George Boole (1815-1864), English mathematician. The surname is a variant of Bull.