/ Dictionary / Index F fosterage: Meaning and Definition of Find definitions for: fos•ter•age Pronunciation: (fô'stur-ij, fos'tur-), [key] — n. the act of fostering or rearing another's child as one's own. the condition of being a foster child. an act of promoting or encouraging: The board will undertake the fosterage of our new project. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fosterage (Thesaurus) foster foster brother Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language