1.
adoptive father; foster father
A man who has legally adopted a child and become their father, or who raises a child in place of their biological father. A formal, legal term.
養父 is a formal, legal term for an adoptive or foster father — a man who raises a child not biologically his own.
Writing
養 (nurture, adopt) + 父 (father). The character 養 appears in many adoption-related words.
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A legal and formal term. In casual conversation, 育ての親 (the parent who raised me) or 育ての父 is more natural.
Related family terms
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Do not confuse with 義父 (father-in-law), which refers to a spouse's father. 養父 specifically means an adoptive/foster father.
Related Words
Compare:
義父 (father-in-law)
Antonym:
実父 (biological father)
Related:
養子 (adopted child)
Related:
養親 (adoptive parent)
Related:
養女 (adopted daughter)