/,kɒntrə'dɪkt; ,kɑntrə`dɪkt/
v
1 [I, Tn] say sth that conflicts with (sth said or written) by (sb), suggesting that the person is mistaken or not telling the truth 反驳（某人）的（言论或文字）; 批驳; 驳斥
*That is true, and don't you dare contradict (me). 这是事实, 你还敢（跟我）强嘴.
* The speaker had got confused, and started contradicting himself. 演讲者弄糊涂了, 说话自相矛盾起来.
2 [Tn] (of facts, evidence, etc) be contrary to (sth); conflict with （指事实、证据等）与（某事物）相反, 或相矛盾
*The two statements contradict each other. 两种说法互相抵触.
* The report contradicts what we heard yesterday. 这个报告与我们昨天听到的有矛盾.

v
[Date: 1500-1600; Language: Latin;Origin: , past participle of contradicere, from contra- ( CONTRA-) + dicere 'to say']
[I and T]
to disagree with something, especially by saying that the opposite is true
　Deborah opened her mouth to contradict, but closed it again.
　Dad just can't bear to be contradicted.
　The article flatly contradicts their claims.
[T]
if one statement, story etc contradicts another, the facts in it are different so that both statements cannot be true
　The witness statements contradict each other and the facts remain unclear.
contradict yourself
to say something that is the opposite of what you said before
　Within five minutes he had contradicted himself twice.