your foster brother is a male who is not a son of your parents but who is raised by your parents
your foster brother is a male who is not a son of your parents but who is raised by your parents
a brother who has only one parent in common with you
a male with the same parents as someone else
a male person who is a fellow member (of a fraternity or religion or other group)
providing or receiving nurture or parental care though not related by blood or legal ties
help develop, help grow
