'Self-contradiction' definitions:

Definition of 'self-contradiction'

From: WordNet
noun
Contradicting yourself

Definition of 'Self-contradiction'

From: GCIDE
  • Self-contradiction \Self`-con`tra*dic"tion\, n. The act of contradicting one's self or itself; repugnancy in conceptions or in terms; a proposition consisting of two members, one of which contradicts the other; as, to be and not to be at the same time is a self-contradiction. [1913 Webster]