Affiliate \Af*fil"i*ate\, v. t. [imp. & p. p. Affiliated; p. pr. & vb. n. Affiliating.]

[LL. adfiliare, affiliare, to adopt as son; ad + filius son: cf. F. affilier.]

1. To adopt; to receive into a family as a son; hence, to bring or receive into close connection; to ally.

Is the soul affiliated to God, or is it estranged and in rebellion? --I. Taylor.

2. To fix the paternity of; -- said of an illegitimate child; as, to affiliate the child to (or on or upon) one man rather than another.

3. To connect in the way of descent; to trace origin to.

How do these facts tend to affiliate the faculty of hearing upon the aboriginal vegetative processes? --H. Spencer.

4. To attach (to) or unite (with); to receive into a society as a member, and initiate into its mysteries, plans, etc.; -- followed by to or with.

Affiliated societies, societies connected with a central society, or with each other.

Source: Webster's Revised Unabridged Dictionary (1913)