- to bear witness; give or afford evidence.
- Law. to give testimony under oath or solemn affirmation, usually in court.
- 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.
Origin of testify
1350–1400; Middle English testifyen < Latin testificārī to bear witness, equivalent to testi(s) witness + -ficārī -fy
SynonymsSee more synonyms on Thesaurus.com
5. indicate, show, signify, prove.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for testifier
The second testifier was a wood-sawyer, who had occasion to spend a night in the house belonging to the farm.
- (when tr, may take a clause as object) to state (something) formally as a declaration of factI 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
C14: from Latin testificārī, from testis witness
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
Word Origin and History for testifier
Online Etymology Dictionary, © 2010 Douglas Harper