1. Characterizing something by asserting or expressing the opposite of a statement which was made previously: Mike was being so contradictable by first saying one thing, then an hour later he was denying it!
2. Describing something to be inconsistent about or inconsistent with: The witnesses were giving contradictable information, each one describing the accident in a completely different way.
3. Prone to be argued against, such as the truth or correctness of someone's statement or claim about something: James told his friends that his mother was going to have another baby, however it was a very contradictable statement because she was not pregnant!