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

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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 cosponsorship (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 The bill, which does not have any Republican cosponsors, would allow the Fed Board to authorize Federal Reserve banks to purchase municipal bonds on the open market. Daniel Flatley,, "Fed Could Snap Up Municipal Debt Under New Senate Proposal," 8 May 2020 The bill’s cosponsors include Democrats Marcy Kaptur of Toledo and Marcia Fudge of Warrensville Heights. Sabrina Eaton, cleveland, "Ohio Democrats want President Trump to federalize medical supply chain during coronavirus emergency," 24 Mar. 2020 House Bill 475, which has more than 50 bipartisan cosponsors, would ask voters to approve amending the Kentucky Constitution to remove restrictions on what taxing powers the General Assembly can grant cities and counties across the state. Darcy Costello, The Courier-Journal, "Constitutional change could 'uncuff' Kentucky lawmakers on local taxes, advocates say," 27 Feb. 2020 The legislation currently has 63 Democratic cosponsors. CNN, "The cost of tampons is hurting low-income girls. Let's fix that," 21 Oct. 2019 As of September 27, 2019, the Big Cat Public Safety Act has 138 cosponsors in the House, which means that there’s a chance that it could eventually get passed. Gina Vaynshteyn,, "The Real Question After Tiger King: Why Hasn’t The Big Cat Safety Act Become A Law?," 30 Mar. 2020 At last check, Villanueva’s bill had 10 cosponsors, all but one of whom are Democrats. Melissa Sanchez, ProPublica, "A State Senator Had Thousands of Dollars in Ticket Debt. Now She’s Fighting to Make Sure Others Won’t.," 28 Feb. 2020 Her bill has more than 200 cosponsors, including House Speaker Nancy Pelosi (D-Calif.). Jenna Portnoy, Washington Post, "Q and A: D.C. statehood explained," 19 Sep. 2019 Bernie Sanders, a cosponsor of Warren's bill, has also introduced legislation in the Senate promising to hold big Pharma accountable. Nicole Sganga, CBS News, "Four years later, New Hampshire's opioid epidemic still rages on," 7 Feb. 2020

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.

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First Known Use of cosponsor

1849, in the meaning defined above

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Time Traveler for cosponsor

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The first known use of cosponsor was in 1849

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Last Updated

6 Jun 2020

Cite this Entry

“Cosponsor.” Dictionary, Merriam-Webster, Accessed 6 Jun. 2020.

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