noun (n)

• the act of accepting with approval; favorable reception(noun.act)

  Example:
  Its adoption by society.
  

  Synonym:
  acceptance, acceptation, espousal
  

  source: wordnet30
• a legal proceeding that creates a parent-child relation between persons not related by blood; the adopted child is entitled to all privileges belonging to a natural child of the adoptive parents (including the right to inherit)(noun.act)

  source: wordnet30
• the appropriation (of ideas or words etc) from another source(noun.act)

  Synonym:
  borrowing
  

  source: wordnet30
• 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.(noun)

  source: webster1913