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• v  declare invalid
• v  make invalid for use
• v  show to be invalid
• v  take away the legal force of or render ineffective
  invalidate a contract

• This is a pathetic cowardly, personal attack against me intended to damage my credibility and invalidate any support I offer to O'Reilly against the charges that he is a .
• Musharraf, increasingly unpopular since his dismissal late last year of the Supreme Court which was poised to invalidate his recent re-election on constitutional grounds .
• Officials from Illinois secretary of state Jesse White, whose refusal to certify Burris' selection was used as an excuse to invalidate the appointment, to Senate majority leader .

• annul
• quash
• void
• avoid
• nullify
• cancel
• vitiate

• validate

News & Articles

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• Idaho GOP wants to void local laws banning sexual orientation discrimination - Tue, 18 Jun 2013 PST
  Idaho Republican Party leaders want state legislators to wade into city affairs and invalidate local laws that ban discrimination based on sexual orientation such as the one Coeur d’Alene passed after an emotional community debate two weeks ago. Six Idaho cities have passed nondiscrimination ordinances in the past year and a half, and a seventh, Idaho Falls, is looking into one now. The Idaho ...
  June 18, 2013 - The Spokesman-Review
• Idaho GOP wants non-discrimination ordinances voided - Mon, 17 Jun 2013 PST
  Idaho Republican Party leaders are calling on the state Legislature to invalidate local city ordinances that ban discrimination on the basis of sexual orientation - like the one Coeur d’Alene passed after an emotional community debate just two weeks ago.
  June 18, 2013 - The Spokesman-Review
• How the Supreme Court struck a huge blow to voter restriction laws
  In the latest fight over voter registration, the justices invalidate an Arizona proof-of-citizenship requirement
  June 17, 2013 - The Week via Yahoo! News

Quotes

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• Richard Blumenthal in Connecticut Post
  Our lawsuit seeks to invalidate loans that violated state law, allowing consumer to shed illegal, unreasonable fees and conditions that leave them at the precipice of foreclosure,Blumenthal said in a press release.
• Stephen Breyer in Guardian Unlimited
  To invalidate the plans under review is to threaten the promise of Brown,Breyer said.
• Dennis Crouch in BusinessWeek
  Boston University law professor Dennis Crouch wrote on a popular Supreme Court blog, Scotusblog, that "because of KSR, patents will be more difficult to enforce and easier to invalidate."