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con‧tra‧dic‧tion

1 [countable] a difference between two statements, beliefs, or ideas about something that means they cannot both be true :
2 [uncountable] the act of saying that someone else's opinion, statement etc is wrong or not true :
3 a combination of words that seem to be the opposite of each other, with the result that the phrase has no clear meaning :
'Permanent revolution' is a contradiction in terms.
a contradiction in terms
'Permanent revolution' is a contradiction in terms.4 in a way that is opposite to a belief or statement :
Your behaviour is in direct contradiction to the principles you claim to have.
in (direct) contradiction to something
Your behaviour is in direct contradiction to the principles you claim to have.