What does adoption mean?
The definition of adoption
A*dop”tion, n.
Etym: [L. adoptio, allied to adoptare to adopt: cf. F. adoption.]

1 The act of adopting, or state of being adopted; voluntary acceptance of a child of other parents to be the same as one’s own child.
2 Admission to a more intimate relation; reception; as, the adoption of persons into hospitals or monasteries, or of one society into another.
3 The choosing and making that to be one’s own which originally was not so; acceptance; as, the adoption of opinions. Jer. Taylor.