invalidate

[ in-val-i-deyt ]

verb (used with object)

, in·val·i·dat·ed, in·val·i·dat·ing.

1. to render invalid; discredit.

   Synonyms: rebut, refute, disprove, impair, weaken

2. to deprive of legal force or efficacy; nullify.

invalidate

/ ɪnˈvælɪˌdeɪt /

verb

1. to render weak or ineffective, as an argument
2. to take away the legal force or effectiveness of; annul, as a contract

Derived Forms

• inˌvaliˈdation, noun
• inˈvaliˌdator, noun

Other Words From

• in·vali·dation noun
• in·vali·dator noun

Word History and Origins

Origin of invalidate¹

First recorded in 1640–50; invalid ² + -ate ¹

Example Sentences

A data transfer mechanism called Standard Contractual Clauses was not invalidated by the CJEU.

From TechCrunch

A group of gig workers and the SEIU labor union filed a petition this week in the California Supreme Court seeking to invalidate Prop.

From Voice of San Diego

One hundred and twenty-eight members of the House of Representatives and seven senators participated in efforts to overturn legally certified elections and invalidate the votes of millions of people in numerous states.

From Washington Blade

A San Diego Superior Court judge agreed with the criticisms, and invalidated the plan.

From Voice of San Diego

When Democrats in Oregon invalidated one of Hayes’s electors, the contest became stalemated at 184 votes apiece.

From Washington Post

However, in an encouraging sign for clinics—and common sense—the narrow ruling does not invalidate buffer zones in general.

From The Daily Beast

While the Court did not invalidate Section 5, it did rule Section 4(b) unconstitutional.

From The Daily Beast

The gun lobby is currently funding lawsuits all over America, trying to invalidate local, state, and federal gun restrictions.

From The Daily Beast

Is the Supreme Court going to invalidate campaign finance laws further in the aftermath of its 2010 decision in Citizens United?

From The Daily Beast

A consortium of scientists and the American Civil Liberties Union eventually sued to invalidate the patents a few years ago.

From The Daily Beast

Here and there roving parties appeared, but having no recognized leaders, their existence did not invalidate the treaty.

From Project Gutenberg

A foreign patent in order to invalidate an American patent must antedate the invention patented.

From Project Gutenberg

He has indeed fought the letter, and perhaps come off victorious; but does he invalidate its spirit?

From Project Gutenberg

Provided, that no omission of any of the foregoing duties on the part of an Umpire shall of itself invalidate a game or match.

From Project Gutenberg

This does not by any means invalidate the idea that Voice Culture is properly a subject for scientific regulation.

From Project Gutenberg

Related Words

• abolish
• abrogate
• annul
• discredit
• disqualify
• impair
• negate
• nullify
• overrule
• quash
• revoke
• undermine
• undo