n. 1 backer, supporter, promoter, angel, patron, Maecenas, subsidizer Make a contribution and we will list you as a sponsor of the games 2 (radio or television) advertiser The American broadcasting catch-phrase 'A word from our sponsor' is not to be taken literally
v. 3 back, support, promote, fund, patronize, subsidize, finance, underwrite Hughes agreed to sponsor a campaign to clean up the environment