—v.t. 1. to bring into close association or connection: The research center is affiliated with the university. 2. to attach or unite on terms of fellowship; associate (usually fol. by with in U.S. usage, by to in Brit. usage): to affiliate with the church. 3. to trace the descent, derivation, or origin of: to affiliate a language. 4. to adopt.
5. Law.to fix the paternity of, as an illegitimate child: The mother affiliated her child upon John Doe.
—v.i. to associate oneself; be intimately united in action or interest.
—n. 1. a branch organization.
2. Com. a. a business concern owned or controlled in whole or in part by another concern.
b. a subsidiary.
3. a person who is affiliated; associate; auxiliary.