Definition of "Contradictory" :
noun: two propositions are contradictories if both cannot be true (or both cannot be false) at the same time
adjective: unable for both to exist or be true at the same time
adjective: in disagreement
"Contradictory attributes of unjust justice and loving vindictiveness."
adjective: that confounds or contradicts or confuses
adjective: of words or propositions so related that both cannot be true and both cannot be false
"Perfect' and imperfect' are contradictory terms."