verb (used with object), af·fil·i·at·ed, af·fil·i·at·ing.

  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 followed 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.

verb (used without object), af·fil·i·at·ed, af·fil·i·at·ing.

  1. to associate oneself; be intimately united in action or interest.


  1. a branch organization.
  2. Commerce.
    1. a business concern owned or controlled in whole or in part by another concern.
    2. a subsidiary.
  3. a person who is affiliated; associate; auxiliary.

verb (əˈfɪlɪˌeɪt)

  1. (tr; foll by to or with) to receive into close connection or association (with a larger body, group, organization, etc); adopt as a member, branch, etc
  2. (foll by with) to associate (oneself) or be associated, esp as a subordinate or subsidiary; bring or come into close connectionhe affiliated himself with the Union

noun (əˈfɪlɪɪt, -ˌeɪt)

    1. a person or organization that is affiliated with another
    2. (as modifier)an affiliate member

1761, from Latin affiliatus, past participle of affiliare “to adopt” (see affiliation). Outside legal use, always figurative. Related: Affiliated; affiliating.


1858, from affiliate (v.).


1846, from affiliate (v.).

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