Learner's definition of CONTRADICT
to say the opposite of (something that someone else has said)
to deny the truth of (something)
to deny or disagree with what is being said by (someone)
to not agree with (something) in a way that shows or suggests that it is false, wrong, etc.
She has made statements that contradict each other. [=statements that do not agree and that cannot both be true]
The evidence contradicts his testimony. [=the evidence does not support or agree with his testimony]
The mayor's actions in office contradicted the promises he made during the campaign.
to say or do something that is opposite or very different in meaning to something else that you said or did earlier