To adopt; to receive into a family as a son; hence, to bring or receive into close connection; to ally.
- To adopt or accept as a member, subordinate associate, or branch: The HMO affiliated the clinics last year.
- To associate (oneself) as a subordinate, subsidiary, employee, or member: affiliated herself with a new law firm.
- To assign the origin of.
- To become closely connected or associated: The two unions voted to affiliate.
- A person, organization, or establishment associated with another as a subordinate, subsidiary, or member: network affiliates.