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. (-ē-ĭt, -āt′)
A person, organization, or establishment associated with another as a subordinate, subsidiary, or member: network affiliates.
[Medieval Latin affīliāre, to adopt : Latin ad-, ad- + Latin fīlius, son; see dhē(i)- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.