Meaning

• To adopt; to receive into a family as one's offspring

• To bring or receive into close connection; to ally.

• (said of an illegitimate child) To fix the paternity of

  "to affiliate the child to (or on or upon) one man rather than another"

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

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

Meaning

• Associated, related, or united; subject to a particular affiliation.

  "We are not affiliated with any commercial publisher."