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Definition of cosponsor

cosponsor

/ˌkoʊˈspɑːn.sɚ/
(UK: co-sponsor)
co · spon · sor
Plural:cosponsors
•
Past Simple:cosponsored
•
Past Participle:cosponsored
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Present Participle:cosponsoring
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cosponsor Lexical Profile

cosponsor Game Scores & Validity

• noun

1

A person, organization, or legislator that joins with one or more others to propose, finance, or officially back a legislative bill, event, or project.

Example

"The senator agreed to become a lead cosponsor of the bipartisan infrastructure bill."

Synonyms
View all synonyms for cosponsor
Antonyms
View all antonyms for cosponsor

• verb

1

To sponsor, endorse, or finance a legislative bill, event, or initiative jointly with one or more other people or organizations.

Example

"Two local universities will cosponsor the annual science symposium this autumn."

Synonyms
View all synonyms for cosponsor
Antonyms
View all antonyms for cosponsor

• Rhymes for cosponsor

• Nearby Words

cosmos
cosplay
cosplayer
cosponsor
cosponsorship
cossack
cosset

Cite this Entry

Wordmom. (2026). Definition of Cosponsor. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/cosponsor
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