foster - definition and synonyms

adjective [only before noun] 

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/ˈfɒstə(r)/
  1. relating to fostering a child. A child who is looked after in someone else’s home for a period of time is called a foster child, and the people who look after the child are called foster parents

    She had a good relationship with her foster mother.

    foster care

    foster home/family:

    Both children have been placed with foster families.