Definition of testify in English:

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Pronunciation: /ˈtestəˌfī/

verb (testifies, testifying, testified)

[no object]
1Give evidence as a witness in a law court: he testified against his own commander [with clause]: he testified that he had supplied Barry with crack
More example sentences
  • Indeed, the only witnesses who testified at the trial were the two plaintiffs themselves.
  • All three witnesses have testified that they have not discussed their evidence with each other.
  • The lawyer who is a necessary witness should testify and entrust the conduct of the case to another lawyer.
give evidence, bear witness, be a witness, give one's testimony, attest;
Law  make a deposition
attest, swear, state on oath, state, declare, assert, affirm;
allege, submit, claim;
Law  depose
1.1Serve as evidence or proof of something’s existing or being the case: the bleak lines testify to inner torment
More example sentences
  • At every ground there were sell-outs and lock-outs to testify to the greatness of Gallaher's team.
  • The Bulgarian Orthodox Church could also testify to a person's Bulgarian descent.
  • They all testify to your outstanding clinical skills and unparalleled commitment to the welfare of children.
be evidence/proof of, attest to, confirm, prove, corroborate, substantiate, bear out;
show, demonstrate, bear witness to, speak to, indicate, reveal, bespeak



Pronunciation: /ˈtestəˌfī(ə)r/
Example sentences
  • Arthur Miller is one of the supreme testifiers to the terrible fall where lack of values may lead: the burning of the innocent; the eradication of wisdom and truth.
  • The testifiers are identified by year of birth and place of origin.
  • The moral economy that operated during the hearings is indicated by the fact that commissioners were not uncomfortable if testifiers wept while giving evidence but that they did not like them to become angry.


Late Middle English: from Latin testificari, from testis 'a witness'.

For editors and proofreaders

Syllabification: tes·ti·fy

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