An affiliate is a subordinate group or organization associated with a larger group or organization. For example, the American broadcasting company NBC has hundreds of affiliate stations around the country.

Affiliate comes from the Medieval Latin term affiliat, meaning "adopted as a son," though it's unlikely NBC sees its affiliate companies in quite that way. The word can also be used to describe someone who simply hangs out with someone else a lot, or keeps company with them regularly, whether for business or not.

Definitions of affiliate
  1. verb
    join in an affiliation
    “The two colleges affiliated
    “They affiliated with a national group”
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    type of:
    fall in, get together, join
    become part of; become a member of a group or organization
  2. verb
    keep company with; hang out with
    “She affiliates with her colleagues”
    synonyms: associate, assort, consort
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    become an ally or associate, as by a treaty or marriage
    date, go out, go steady, see
    date regularly; have a steady relationship with
    accompany, companion, company, keep company
    be a companion to somebody
    make a bad alliance; ally inappropriately
    type of:
    act together or towards others or with others
  3. noun
    a subsidiary or subordinate organization that is affiliated with another organization
    “network affiliates
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    type of:
    organisation, organization
    a group of people who work together
  4. noun
    a subordinate or subsidiary associate; a person who is affiliated with another or with an organization
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    type of:
    a person who joins with others in some activity or endeavor
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