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

On the federal level, Rep. Ken Buck (R-Colo.) introduced the Combating Organized Retail Crime Act in the House, garnering 138 cosponsors. —Evan Clark, WWD, 22 Nov. 2024

Among his cosponsors is Democratic Sens. Amy Klobuchar of Minnesota and Richard Blumenthal of Connecticut. —Andy Sevilla, Austin American-Statesman, 17 Sep. 2024

Neither the university nor several cosponsors of the contest responded to WIRED’s inquiry about the competition. —Kim Zetter, WIRED, 18 Sep. 2024

The New York Republican posted emails from his staff to Manning's on June 5 and again on June 13 asking for him to be added as a cosponsor. —Andrew Solender, Axios, 21 Oct. 2024

Word History

First Known Use

1849, in the meaning defined above