Definition of: affiliate

(ə·fil′ē·āt) v. ·at·ed, ·at·ing v.t.
1. To associate or unite, as a member or branch to a larger or principal body: with to or with.
2. To join or associate (oneself): with with.
3. To receive as a child; adopt.
4. To fix the legal paternity of.
5. To determine relations of, as the sources or branches of a field of study.
—v.i.
6. To associate or ally oneself: with with.
—adjective Affiliated.
—noun Something affiliated. [<L affiliatus, pp. of affiliare adopt < ad- to + filius son]