cosponsor
noun
co·spon·sor
(ˌ)kō-ˈspän(t)-sər 
variants
or co-sponsor
plural cosponsors or co-sponsors
: 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
The Daily Mining Gazette
cosponsor
transitive verb
or co-sponsor
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
George Russell
The following summer, Bingham returned to Machu Picchu with an expedition co-sponsored by the National Geographic Society.
—Duane Damon
Duane Damon
cosponsorship
noun
or co-sponsorship
Increasingly, large urban malls are being built with the co-sponsorship of city governments.
—Witold Rybczynski
Witold Rybczynski
Examples of cosponsor in a Sentence
Recent Examples on the Web
The measure has 85 Senate cosponsors.
—Alexander Bolton, The Hill, 10 Sep. 2025
With long-time cosponsor Arizona State University, the ASU+GSV Summit and its fledgling AI Show drew 15,000 attendees this past spring, up from 10,000 in 2024 and 6,300 in 2023, says Michael Moe, founder and CEO of GSV, a venture capital firm focused on the education and workforce skills market.
—Emma Whitford, Forbes.com, 30 July 2025
The bipartisan Sanctioning Russia Act of 2025, in the Senate, has 80 cosponsors and is garnering significant support on both sides of the aisle.
—Gabe Whisnant, MSNBC Newsweek, 8 July 2025
The bottom line: The bill currently has three Democratic cosponsors, but the issue seemed to be eroding chances for strong bipartisan support.
—Brady Dale, Axios, 2 Apr. 2025
See All Example Sentences for cosponsor
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Alexander Bolton, The Hill, 10 Sep. 2025
With long-time cosponsor Arizona State University, the ASU+GSV Summit and its fledgling AI Show drew 15,000 attendees this past spring, up from 10,000 in 2024 and 6,300 in 2023, says Michael Moe, founder and CEO of GSV, a venture capital firm focused on the education and workforce skills market.
—Emma Whitford, Forbes.com, 30 July 2025
The bipartisan Sanctioning Russia Act of 2025, in the Senate, has 80 cosponsors and is garnering significant support on both sides of the aisle.
—Gabe Whisnant, MSNBC Newsweek, 8 July 2025
The bottom line: The bill currently has three Democratic cosponsors, but the issue seemed to be eroding chances for strong bipartisan support.
—Brady Dale, Axios, 2 Apr. 2025
See All Example Sentences for cosponsor
Cite this Entry
“Cosponsor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosponsor. Accessed 14 Sep. 2025.
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