- 1[intransitive, transitive] to make a statement that something happened or that something is true, especially as a witness in court testify (against/for somebody) She refused to testify against her husband. There are several witnesses who will testify for the defence. testify about something He was summoned to testify before a grand jury about his role in the affair. testify to something/to doing something Evans testified to receiving $200 000 in bribes. testify (that)… He testified (that) he was at the theatre at the time of the murder. + speech ‘I was approached by a man I did not recognize,’ she testified.
- 2[transitive] testify (that)… (formal) to say that you believe something is true because you have evidence of it Too many young people are unable to write or spell well, as employers will testify.
- 3[intransitive] (especially North American English) to express your belief in God publicly Word Origin late Middle English: from Latin testificari, from testis
BrE BrE//ˈtestɪfaɪ//; NAmE NAmE//ˈtestɪfaɪ//Verb Forms present simple I / you / we / they testify
BrE BrE//ˈtestɪfaɪ//; NAmE NAmE//ˈtestɪfaɪ//he / she / it testifies
BrE BrE//ˈtestɪfaɪz//; NAmE NAmE//ˈtestɪfaɪz//past simple testified
BrE BrE//ˈtestɪfaɪd//; NAmE NAmE//ˈtestɪfaɪd//past participle testified
BrE BrE//ˈtestɪfaɪd//; NAmE NAmE//ˈtestɪfaɪd//-ing form testifying
BrE BrE//ˈtestɪfaɪɪŋ//; NAmE NAmE//ˈtestɪfaɪɪŋ//