authenticate synonym, authenticate definition | Thesaurus

Collins

authenticate

  
  
attest, authorize, avouch, certify, confirm, endorse, guarantee, validate, verify, vouch for, warrant  
  
Antonyms     
   annul, invalidate, render null and void  
English Collins Dictionary - English synonyms & Thesaurus  
Collins

authenticate

  
  ( authenticates    3rd person present)   ( authenticating    present participle)   ( authenticated    past tense & past participle  ) If you authenticate something, you state officially that it is genuine after examining it.      verb  
He says he'll have no problem authenticating the stamp...      V n  

Translation English - Cobuild Collins Dictionary  

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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"