Gloss: of words or propositions so related that both cannot be true and both cannot be false; "`perfect' and `imperfect' are contradictory terms"
similar to 302381764 - antonymous
derivationally related 113857486 - contradictoriness
derivationally related 202663141 - belie, contradict, negate
derivationally related 200823436 - contradict, contravene, negate