co·​spon·​sor | \ (ˌ)kō-ˈspän(t)-sər How to pronounce cosponsor (audio) \
variants: or co-sponsor
plural cosponsors or co-sponsors

Definition of cosponsor

: a joint sponsor The senator was a cosponsor for both bills. Michigan Tech Student Relay For Life is a participating cosponsor of this event.The Daily Mining Gazette

Other Words from cosponsor

cosponsor or co-sponsor transitive verb cosponsored or co-sponsored; cosponsoring or co-sponsoring
This year Simpson is carrying on the legislative struggle without Mazzoli, who has declined to cosponsor the bill without support from the Democratic House leadership … — George Russell The following summer, Bingham returned to Machu Picchu with an expedition co-sponsored by the National Geographic Society. — Duane Damon
cosponsorship \ (ˌ)kō-​ˈspän(t)-​sər-​ˌship How to pronounce cosponsor (audio) \ or co-sponsorship noun
Increasingly, large urban malls are being built with the co-sponsorship of city governments. — Witold Rybczynski

Examples of cosponsor in a Sentence

Recent Examples on the Web That’s the purpose of the trust fund, which was approved by the City Council last year with Dickens as a cosponsor. Wilborn Nobles, ajc, 16 May 2022 Tuberville is a cosponsor of the Sunshine Protection Act that would make daylight saving time permanent. Howard Koplowitz |, al, 7 Mar. 2022 This article has also been corrected to reflect the fact that Rep. Massie was not a cosponsor of Rep. Rosendale’s bill. John Mccormack, National Review, 4 Mar. 2022 As of this writing, Stefanik is the third and highest-ranking cosponsor to have withdrawn support for FFAA. Nate Hochman, National Review, 9 Feb. 2022 The office of Mark Amodei, an FFAA cosponsor from Nevada’s second congressional district, expressed interest in discussing the legislation, but could not find time to do so before this article was published. Nate Hochman, National Review, 9 Feb. 2022 Look for ads in the ADN, which is a cosponsor of this important program. Jeff Lowenfels, Anchorage Daily News, 9 Dec. 2021 Councilman Bill Hollander, D-9th, also asked to be added as a cosponsor during discussion. Emma Austin, The Courier-Journal, 18 June 2021 Democrat Stephanie Murphy, who represents portions of the Orlando area, is a cosponsor. Max Chesnes, USA TODAY, 9 July 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cosponsor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of cosponsor

1849, in the meaning defined above

Learn More About cosponsor

Time Traveler for cosponsor

Time Traveler

The first known use of cosponsor was in 1849

See more words from the same year

Dictionary Entries Near cosponsor




See More Nearby Entries 

Statistics for cosponsor

Cite this Entry

“Cosponsor.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on cosponsor

Thesaurus: All synonyms and antonyms for cosponsor


Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!