surrogate
— Noun
– English
～ a person appointed to represent or act on behalf of others
surrogate mother
— Noun
– English
～ a woman who bears a child for a couple where the wife is unable to do so; "a surrogate mother is artificially inseminated with the father's semen and carries the fetus to term"
surrogate
— Noun
– English
～ someone who takes the place of another person
surrogate
— Adjective
– English
～ providing or receiving nurture or parental care though not related by blood or legal ties; "foster parent"; "foster child"; "foster home"; "surrogate father"