/ ˌkɒntrəˈdɪkt; NAmE ˌkɑːn-/ verb
1.
to say that sth that sb else has said is wrong, and that the opposite is true :
[ vn ]
All evening her husband contradicted everything she said.
You've just contradicted yourself (= said the opposite of what you said before) .
[also v speech , vn speech ]
2.
[ vn ] ( of statements or pieces of evidence ) to be so different from each other that one of them must be wrong :
The two stories contradict each other.
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WORD ORIGIN
late 16th cent.: from Latin contradict- spoken against, from the verb contradicere , originally contra dicere speak against.