The passing of judgment on an issue under consideration. The act of reaching a conclusion or making up one's mind. A conclusion or judgment reached or pronounced; a verdict. Firmness of character or action; determination. Sports A victory won on points in boxing when no knockout has occurred or in wrestling when no fall has occurred. Baseball A win or loss accorded to a pitcher: has four wins in six decisions. Sports To defeat by a decision, as in boxing: decisioned his opponent in the third round.