Noah Webster's Dictionary 1. (v. t.) To feed; to nourish; to support; to bring up. 2. (v. t.) To cherish; to promote the growth of; to encourage; to sustain and promote; as, to foster genius. 3. (v. i.) To be nourished or trained up together. 4. (v. t.) Relating to nourishment; affording, receiving, or sharing nourishment or nurture; -- applied to father, mother, child, brother, etc., to indicate that the person so called stands in the relation of parent, child, brother, etc., as regards sustenance and nurture, but not by tie of blood. 5. (n.) A forester. 6. (n.) One who, or that which, fosters.

Multi-Version Concordance Foster (2 Occurrences) Acts 13:1 Now in the assembly that was at Antioch there were some prophets and teachers: Barnabas, Simeon who was called Niger, Lucius of Cyrene, Manaen the foster brother of Herod the tetrarch, and Saul. (WEB WEY ASV DBY YLT) Isaiah 49:23 And kings shall be thy nursing fathers, and their queens thy nursing mothers: they shall bow down to thee with their faces to the earth, and lick the dust of thy feet; and thou shalt know that I am Jehovah; and they that wait for me shall not be put to shame. (See JPS RSV NIV)