Foster is defined as to promote or encourage or to raise a child who is not one's biological or adoptive child.
(verb)See foster in Webster's New World College Dictionary
transitive verb
Origin: ME fostren < OE fostrian, to nourish, bring up < fostor, food, nourishment < base of foda, food
adjective
Related Forms:
See foster in American Heritage Dictionary 4
transitive verb fos·tered, fos·ter·ing, fos·ters
Origin:
Origin: Middle English fostren
Origin: , from Old English *fōstrian, to nourish
Origin: , from fōstor, food, nourishing; see pā- in Indo-European roots
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