sponsor

American  

[spon-ser] / ˈspɒn sər /

noun

1. a person who vouches or is responsible for a person or thing.

   Synonyms:

   guarantor, backer, patron

2. a person, firm, organization, etc., that finances and buys the time to broadcast a radio or television program so as to advertise a product, a political party, etc.

   Synonyms:

   advertiser

3. a person who makes a pledge or promise on behalf of another.

4. Christianity. a person who promises to mentor a youth or new convert preparing for confirmation or initiation, or who answers for an infant at baptism.

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verb (used with object)

1. to act as sponsor for; promise, vouch, or answer for.

   Synonyms:

   underwrite, back, finance, guarantee

sponsor British  

/ ˈspɒnsə, spɒnˈsɔːrɪəl /

noun

1. 1. a commercial organization that pays all or part of the cost of putting on a concert, sporting event, etc

   2. a person who donates money to a charity when the person requesting the donation has performed a specified activity as part of an organized fund-raising effort

2. a person or business firm that pays the costs of a radio or television programme in return for advertising time

3. a legislator who presents and supports a bill, motion, etc

4. Also called: godparent. 

   1. an authorized witness who makes the required promises on behalf of a person to be baptized and thereafter assumes responsibility for his Christian upbringing

   2. a person who presents a candidate for confirmation

5. a person who undertakes responsibility for the actions, statements, obligations, etc, of another, as during a period of apprenticeship; guarantor

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verb

1. (tr) to act as a sponsor for

Other Word Forms

• sponsorial adjective
• sponsorship noun
• unsponsored adjective

Etymology

Origin of sponsor

First recorded in 1645–55; from Latin spōnsor “guarantor,” equivalent to spond(ēre) “to pledge” + -tor -tor, with dt becoming s

Explanation

A sponsor provides support for someone or something, typically by supplying cash. Because your company is a sponsor for a homeless organization, they provide funding for the annual 5K run to raise money for the shelter. The word sponsor stems from the Latin word spondre, meaning "give assurance, promise solemnly." A sponsor might support an important issue such as cancer research or education, or a sponsor might take responsibility for someone. You might be your brother's sponsor so he can join your exclusive chess group. Sponsor has a verb form to describe the action of supporting or leading something. You can sponsor a nonprofit arts organization by donating and participating on the board.

Example Sentences

“We have informed the organizers of our concerns and as it stands, Diageo will not sponsor the 2026 Wireless festival,” the spirits and beer maker said.

From The Wall Street Journal • Apr. 7, 2026

BDCs sponsor CLOs, which pool a large amount of company loans together.

From Barron's • Apr. 4, 2026

The chief sponsor of the bill, Senate President Rob Wagner, a Democrat representing the Portland suburb of Lake Oswego, also declined to answer when asked if he was aware of Oregon’s investigations into Dundon’s businesses.

From Salon • Mar. 30, 2026

And this year, the Japanese clothing retailer Uniqlo will be a field sponsor at Dodger Stadium.

From Los Angeles Times • Mar. 25, 2026

"People will help you in the arena. They'll be tripping over each other to sponsor you."

From "The Hunger Games" by Suzanne Collins

Related Words

• advocate
• backer
• benefactor
• patron
• promoter
• supporter
• underwriter