Affiliate definition : A type of inter-company relationship in which one of the companies owns less than a majority of the other company's stock, or a type of inter-company relationship in which at least two different companies are subsidiaries of a larger company.
Affiliate, in web marketing an affiliate normally receives a
commission for promoting another company's products or services.
For example, let's say BIG Corp. owns 40% of MID Corp.'s common stock and 75% of TINY Corp. In this case, MID Corp. and BIG Corp. have an affiliate relationship, and TINY Corp. is BIG Corp.'s subsidiary.