n.
Pronunciation: -p ə - ' zi-sh ə n
Function: noun
Etymology: Late Latin contraposition-, contrapositio, from Latin contraponere to place opposite, from contra- + ponere to place ― more at POSITION
Date: 1551
: the relationship between two propositions when the subject and predicate of one are respectively the negation of the predicate and the negation of the subject of the other