a ‧ dop ‧ tion /əˈdɒpʃ ə n $ əˈdɑːp-/ BrE AmE noun
1 . [uncountable and countable] the act or process of adopting a child:
She decided to put the baby up for adoption.
2 . [uncountable] the act of starting to use a particular plan, method, way of speaking etc
3 . [uncountable] British English the choice of a particular person to represent a political party in an election