to make solemn declaration.
to bear witness to; affirm as fact or truth; attest.
to give or afford evidence of in any manner.
Law. to state or declare under oath or affirmation, usually in court.
to declare, profess, or acknowledge openly.
- tes·ti·fi·er, noun
- pre·tes·ti·fy, verb (used with object), pre·tes·ti·fied, pre·tes·ti·fy·ing.
- re·tes·ti·fy, verb, re·tes·ti·fied, re·tes·ti·fy·ing.
- un·tes·ti·fy·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use testify in a sentence
The second testifier was a wood-sawyer, who had occasion to spend a night in the house belonging to the farm.
British Dictionary definitions for testify
(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
law to declare or give (evidence) under oath, esp in court
(when intr, often foll by to) to be evidence (of); serve as witness (to): the money testified to his good faith
(tr) to declare or acknowledge openly
- testification, noun
- testifier, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012