View synonyms for testify


[ tes-tuh-fahy ]

verb (used without object)

, tes·ti·fied, tes·ti·fy·ing.
  1. to bear witness; give or afford evidence.
  2. Law. to give testimony under oath or solemn affirmation, usually in court.
  3. to make solemn declaration.

verb (used with object)

, tes·ti·fied, tes·ti·fy·ing.
  1. to bear witness to; affirm as fact or truth; attest.
  2. to give or afford evidence of in any manner.

    Synonyms: prove, signify, show, indicate

  3. Law. to state or declare under oath or affirmation, usually in court.
  4. to declare, profess, or acknowledge openly.


/ ˈtɛstɪˌfaɪ /


  1. when tr, may take a clause as object to state (something) formally as a declaration of fact

    I testify that I know nothing about him

  2. law to declare or give (evidence) under oath, esp in court
  3. whenintr, often foll by to to be evidence (of); serve as witness (to)

    the money testified to his good faith

  4. tr to declare or acknowledge openly

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Derived Forms

  • ˌtestifiˈcation, noun
  • ˈtestiˌfier, noun

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Other Words From

  • tes·ti·fi·er noun
  • pre·tes·ti·fy verb (used with object) pretestified pretestifying
  • re·tes·ti·fy verb retestified retestifying
  • un·tes·ti·fy·ing adjective

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Word History and Origins

Origin of testify1

1350–1400; Middle English testifyen < Latin testificārī to bear witness, equivalent to testi ( s ) witness + -ficārī -fy

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Word History and Origins

Origin of testify1

C14: from Latin testificārī, from testis witness

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Example Sentences

He said the then- secretary testified to a House committee that, in 2017, DHS had prevented 3,755 KSTs from traveling to or entering the US, even though the real number was no more than three.

From Vox

Coming out still takes courage, as many a teenager can testify.

Singer, who has also pleaded guilty, was expected to testify against them if they had gone to trial.

From Fortune

This will be the first time that Amazon CEO Jeff Bezos, the world’s wealthiest individual, will be testifying before Congress.

Under the reigning interpretation of American antitrust law, the executives who testify this week have little to fear from lawmakers or regulators.

From Quartz

Dean Sybil Todd passed away from pancreatic cancer before she could testify.

Instead, he barely pushed the jurors to charge the cop and allowed the unprecedented step of letting the officer testify.

The lady who Goldberg is referring to is Barbara Bowman, one of the victims who agreed to testify in the 2006 case.

“We were looking at 10 men with rifles, and then the beating began,” the survivor would later testify.

He became determined to locate other victims who would testify to abuses that could put Lebovits behind bars.

For her to testify that she did not love—and had never loved Jean Baptiste, he knew would be a deliberate falsehood.

And then today—yesterday you reached your climax by having me go on the stand and testify to a greater lie!

And how would the general confederation testify to a glorious work of reformation!

Nor was Africa then, without the evidence of industry, as history will testify.

Growers of Havana tobacco in the Connecticut valley can testify to this, and especially to the increased size of the plants.