What does affiliation mean?
The definition of affiliation
Af*fil`i*a”tion, n.
Etym: [F. affiliation, LL. affiliatio.]

1 Adoption; association or reception as a member in or of the same family or society.
2 (Law)
The establishment or ascertaining of parentage; the assignment of a child, as a bastard, to its father; filiation.
3 Connection in the way of descent. H. Spencer.