1. somebody responsible for another: somebody who becomes responsible for somebody else, especially during education, apprenticeship, or probation
2. broadcasting radio or television advertiser: a person or a business that pays for radio or television programming by buying advertising time
3. contributor to funding of event: a person or organization that provides or pledges money to help fund an event, especially an event run by another person or group
4. contributor to charity: a person or organization that donates money to a charity on the basis of the performance of a participant in an organized fundraising event
5. politics legislator: a legislator who proposes and supports the passage of a bill
6. supporter: a country, organization, or group that supports or organizes an activity, or vouches for the acceptability of another
7. christianity somebody answering at child's baptism: somebody who answers on behalf of a child at baptism and becomes responsible for the child's religious upbringing
(
formal
)
transitive verb (past and past participlespon·sored, present participlespon·sor·ing, 3rd person present singularspon·sors)
Definition:
act as sponsor to somebody: to act as a sponsor to somebody or something
[Mid-17th century. < late Latin, "baptismal sponsor" < Latin spons-, past participle of spondere "pledge"]