Foster \Fos"ter\, v. t. [imp. & p. p. {Fostered}, p. pr. & vb. n. {Fostering}.] [OE. fostren, fr. AS. f[=o]ster, f[=o]stor, food, nourishment, fr. f[=o]da food. [root]75. See {Food}.] 1. To feed; to nourish; to support; to bring up. [1913 Webster] Some say that ravens foster forlorn children. --Shak. [1913 Webster] 2. To cherish; to promote the growth of; to encourage; to sustain and promote; as, to foster genius. [1913 Webster]