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authenticate

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Authenticate
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au⋅then⋅ti⋅cate

  [aw-then-ti-keyt]
Use authenticate in a Sentence
–verb (used with object), -cat⋅ed, -cat⋅ing.
1. to establish as genuine.
2. to establish the authorship or origin of conclusively or unquestionably, chiefly by the techniques of scholarship: to authenticate a painting.
3. to make authoritative or valid.
Origin:
1565–75; < ML authenticātus made authentic (ptp. of authenticāre). See authentic, -ate 1

Related forms:
au⋅then⋅ti⋅cat⋅a⋅ble, adjective
au⋅then⋅ti⋅ca⋅tion, noun

Synonyms:
1. confirm, validate, substantiate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Authenticate
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Authenticates
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au·then·ti·cate   (ô-thěn'tĭ-kāt')   
tr.v.   au·then·ti·cat·ed, au·then·ti·cat·ing, au·then·ti·cates
To establish the authenticity of; prove genuine: a specialist who authenticated the antique samovar. See Synonyms at confirm.
au·then'ti·ca'tion n., au·then'ti·ca'tor n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Legal Dictionary

Main Entry: au·then·ti·cate
Function: transitive verb
Inflected Forms: -cat·ed; -cat·ing
1 : to prove or serve to prove that (something) is genuine; especially : to prove that (an item of evidence) is genuine for the purpose of establishing admissibility
2 : to make (a written instrument) valid and effective by marking esp. with one's signature <authenticate a check>
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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