Dictionary.com
Thesaurus.com
Synonyms

ratify

American  
[rat-uh-fahy] / ˈræt əˌfaɪ /

verb (used with object)

ratified, ratifying
  1. to confirm by expressing consent, approval, or formal sanction.

    to ratify a constitutional amendment.

    Synonyms:
    approve, corroborate
    Antonyms:
    disapprove, veto
  2. to confirm (something done or arranged by an agent or by representatives) by such action.

    Synonyms:
    establish, validate

ratify British  
/ ˈrætɪˌfaɪ /

verb

  1. (tr) to give formal approval or consent to

"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

Other Word Forms

  • nonratifying adjective
  • ratifiable adjective
  • ratification noun
  • ratifier noun

Etymology

Origin of ratify

First recorded in 1325–75; Middle English ratifien, from Middle French ratifier, from Medieval Latin ratificāre, equivalent to Latin rat(us) “calculated” ( rate 1 ) + -ificāre -ify

Explanation

To ratify a treaty or contract is to officially approve it by signing or voting for it. You and your brothers and sisters might devise a plan for a family vacation to Disney World, but it would need to be ratified by your parents. You are most likely to hear the word ratify when talking about laws. In the U.S., Congress writes bills, but they need to be ratified before they become law. An amendment to the U.S. Constitution must be ratified by three-fourths of the states, either passed by the state legislatures or by state conventions.

Keep Reading on Vocabulary.com

Vocabulary lists containing ratify

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sir Keir said this year's summit "will not just ratify existing commitments made at last year's summit" but would be "more ambitious".

From BBC • Apr. 1, 2026

The European Union will provisionally apply its trade agreement with South American countries as lawmakers in the bloc are still waiting to ratify the accord.

From The Wall Street Journal • Mar. 26, 2026

This week, the Basement’s union voted unanimously to ratify its first working contract, making it the first and only escape room to have a union and operate under a collective bargaining agreement.

From Los Angeles Times • Mar. 6, 2026

Hours earlier, neighboring Uruguay was first out of the blocks to ratify the deal, which has been fiercely opposed by farmers in some EU countries.

From Barron's • Feb. 26, 2026

Both the state house and the state senate had to ratify.

From "Votes for Women!" by Winifred Conkling