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invalidate

 - 3 dictionary results

in⋅val⋅i⋅date

  [in-val-i-deyt]
Use invalidate in a Sentence
–verb (used with object), -dat⋅ed, -dat⋅ing.
1. to render invalid; discredit.
2. to deprive of legal force or efficacy; nullify.
Origin:
1640–50; invalid 2 + -ate 1

Related forms:
in⋅val⋅i⋅da⋅tion, noun
in⋅val⋅i⋅da⋅tor, noun

Synonyms:
1. weaken, impair; disprove, refute, rebut.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To invalidate
in·val·i·date   (ĭn-vāl'ĭ-dāt')   
tr.v.   in·val·i·dat·ed, in·val·i·dat·ing, in·val·i·dates
To make invalid; nullify.
in·val'i·da'tion n., in·val'i·da'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: in·val·i·date
Pronunciation: in-'va-l&-"dAt
Function: transitive verb
: to make or declare invalid invalidating the statute> —in·val·i·da·tion /in-"va-l&-'dA-sh&n/ noun
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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