v. af·fil·i·at·ed, af·fil·i·at·ing, af·fil·i·ates
1. To adopt or accept as a member, subordinate associate, or branch: The HMO affiliated the clinics last year.
2. To associate (oneself) as a subordinate, subsidiary, employee, or member: affiliated herself with a new law firm.
3. To assign the origin of.
To become closely connected or associated: The two unions voted to affiliate.
n. (--t, -t)
A person, organization, or establishment associated with another as a subordinate, subsidiary, or member: network affiliates.
[Medieval Latin afflire, to adopt : Latin ad-, ad- + Latin flius, son; see dh(i)- in Indo-European roots.]