Contradictory

What does CONTRADICTORY mean?

1. adjective

   of words or propositions so related that both cannot be true and both cannot be false

   “`perfect' and `imperfect' are contradictory terms”

2. noun

   two propositions are contradictories if both cannot be true (or both cannot be false) at the same time

3. adjective

   that confounds or contradicts or confuses

4. adjective

   in disagreement

   “the figures are at odds with our findings”

Definitions from WordNet 3.1, Princeton University.