<p><strong>Verb (used with object)</strong></p><ul><li>to bring into close association or connection of action or interest: You can download resources to affiliate your event with our fundraising campaign.</li><li>The research center is affiliated with the university.</li><li>to attach or unite (oneself or another person) in fellowship or membership; associate (usually followed by with in U.S. usage, by to in British usage): He affiliated himself with almost every group dedicated to improving the economic condition of the individual farmer.</li><li>to trace the descent, derivation, or origin of: Competing hypotheses affiliate the language with either Afroasiatic or Nilo-Saharan.</li><li>to integrate or extend membership to; adopt (as an affiliate): The National Golf Federation affiliated the club, giving it an immediate prestige.</li><li>to connect or associate in thought: Many people tend to affiliate the sciences with better pay and job security.</li><li>Law. to fix the paternity of, as an illegitimate child: The mother affiliated her child upon John Doe.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to associate oneself; be intimately united in action or interest: Our health advocacy group affiliates with hospitals equipped with the best facilities.</li></ul><p><strong>Noun</strong></p><ul><li>a branch organization.</li><li>Commerce. a business concern in which a larger concern owns a minority stake, or in which a third concern, the parent of both, owns a majority stake or has been given control by contract: The video was reportedly broadcast on STV, an affiliate of Global Television, on September 30, 1999.</li><li>(especially in online retail) a company that retails goods on behalf of one or more other companies, paying them a commission: Cookies are used to track a customer's progress from the website of the affiliate through to the shopping cart of the merchant.</li><li>(in U.S. tax law) subsidiary: Development Tax Credits are not available for property owned by the taxpayer or an affiliate prior to July 3, 2000.</li><li>a person who is affiliated; associate; subordinate.</li></ul>