noun

1. A person or organisation with some sort of responsibility for another person or organisation, especially where the responsibility has a religious, legal, or financial aspect.

   “He was my sponsor when I applied to join the club.”

2. One that pays all or part of the cost of an event, a publication, or a media program, usually in exchange for advertising time.

   “And now a word from our sponsor.”

Synonyms: patron, underwriter

verb

1. To be a sponsor for.