- asserting the contrary or opposite; contradicting; inconsistent; logically opposite: contradictory statements.
- tending or inclined to contradict.
- a proposition so related to a second that it is impossible for both to be true or both to be false.
- inconsistent; incompatible
- given to argument and contention
- (of a pair of statements) unable both to be true or both to be false under the same circumstances
- a statement that cannot be true when a given statement is true or false when it is false
