Definition: boolean

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Source: WordNet (r) 1.7 

Boolean
     adj : of or relating to a combinatorial system devised by George
           Boole that combines propositions with the logical
           operators AND and OR and IF THEN and EXCEPT and NOT
           [syn: Boolean]

Source: The Free On-line Dictionary of Computing (2003-OCT-10) 

Boolean

   <mathematics, logic> 1. Boolean algebra.

    2. (bool) The type of an expression with two
   possible values, "true" and "false".  Also, a variable of
   Boolean type or a function with Boolean arguments or result.
   The most common Boolean functions are AND, OR and NOT.

   (1997-12-01)