verb , noun
■ verb / əˈfɪlieɪt; NAmE /
1.
[ vn ] [ usually passive ] affiliate sb/sth (with / to sb/sth) to link a group, a company, or an organization very closely with another larger one :
The hospital is affiliated with the local university.
The group is not affiliated to any political party.
2.
affiliate (yourself) (with sb/sth) to join, to be connected with, or to work for an organization :
[ vn ]
The majority of people questioned affiliated themselves with a religious group.
[also v ]
■ noun
/ əˈfɪliət/ a company, an organization, etc. that is connected with or controlled by another larger one
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WORD ORIGIN
mid 18th cent.: from medieval Latin affiliat- adopted as a son, from the verb affiliare , from ad- towards + filius son.