Turned end for end, or in the opposite direction; having a contrary course or tendency; inverted: opposed to direct.In mathematics, opposite in nature and effect: said with reference to any two operations which, when both performed in succession upon the same quantity, leave it unaltered: thus, subtraction is inverse to addition, division to multiplication, extraction of roots to the raising of powers, etc.n. An inverted state or condition; a direct opposite; something directly or absolutely contrary to something else: as, the inverse of a proposition.In logic, with conclusion as hypothesis and hypothesis as conclusion.n. In logic, a proposition made by simply interchanging the hypothesis and conclusion of another, without any restriction.n. In mathematics, an inverse point, curve, function, ratio, proportion, etc.n. In rouge-et-noir, the triangular space in which bets are placed when wagering that the first card dealt for a color will not be the same color as the one that wins the coup: opposed to couleur. See rouge-et-noir.