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

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

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 

noun

or co-sponsorship

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

Bill cosponsors include Oklahoma Representative Josh Brecheen, Maryland Representative Andy Harris, and Florida Representative Anna Paulina Luna. Newsweek reached out to all four lawmakers for comment. —Ron Estes, MSNBC Newsweek, 28 Mar. 2025

The bill, now headed to the Senate, has 21 cosponsors in the House, and all but two are Republican. —Kaitlyn Schallhorn, Oc Register, 27 Mar. 2025

Garbarino proposed the Metastatic Breast Cancer Access to Care Act with support from cosponsors Representatives Kathy Castor, Florida Democrat for the 14th District; Brian Fitzpatrick, Pennsylvania Republican for the 1st District; and Judy Chu, a Democrat in California's 28th District. —Raja Krishnamoorthi, Newsweek, 13 Mar. 2025

Scott’s bill has 16 cosponsors from both sides of the aisle and has been referred to the Committee on Commerce, Science, and Transportation. —Addy Bink, The Hill, 15 Feb. 2025

Word History

First Known Use

1849, in the meaning defined above

Rhymes for cosponsor

• sponsor