- to render invalid; discredit.
- to deprive of legal force or efficacy; nullify.
Origin of invalidate
SynonymsSee more synonyms for invalidate on Thesaurus.com
1. weaken, impair; disprove, refute, rebut.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for invalidate
However, in an encouraging sign for clinics—and common sense—the narrow ruling does not invalidate buffer zones in general.The Supreme Court Lets Abortion Clinics Protect Themselves
June 26, 2014
While the Court did not invalidate Section 5, it did rule Section 4(b) unconstitutional.Eric Cantor’s Last, Legacy-Burnishing Task: Update the VRA
June 16, 2014
The gun lobby is currently funding lawsuits all over America, trying to invalidate local, state, and federal gun restrictions.Hands Off Those Gun Laws, Judges
June 1, 2014
Is the Supreme Court going to invalidate campaign finance laws further in the aftermath of its 2010 decision in Citizens United?McCutcheon v. FEC: Big Money Fights Back at the Supreme Court
October 9, 2013
A consortium of scientists and the American Civil Liberties Union eventually sued to invalidate the patents a few years ago.The Supremes Get It Right, Naturally.
June 14, 2013
Oh, tell me that the name of wife does not invalidate the claims of love!Tales And Novels, Volume 8 (of 10)
The most one can do in this line is to invalidate the arguments for eternity.A History of Mediaeval Jewish Philosophy
The fables that have grown around the memory of the hero do not invalidate the pedigree.Shakespeare's Family
Mrs. C. C. Stopes
To say that they have been products of evolution is not to invalidate them.Man And His Ancestor
There are some passages in the New Testament which seem to invalidate this truth.The Expositor's Bible: The Book of Proverbs
R. F. Horton
- to render weak or ineffective, as an argument
- to take away the legal force or effectiveness of; annul, as a contract
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 invalidate
Online Etymology Dictionary, © 2010 Douglas Harper