vb. To feed; to nourish; to support; to bring up. To cherish; to promote the growth of; to encourage; to sustain and promote; as, to foster genius. A parental relationship between parties not related by blood.
- vb. To be nourished or trained up together.
- adj. 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.
- Foster babe, or child, an infant of child nursed by a woman not its mother, or bred by a man not its father.
- Foster brother, Foster sister, one who is, or has been, nursed at the same breast, or brought up by the same nurse as another, but is not of the same parentage. - Foster dam, one who takes the place of a mother; a nurse.
- Foster earth, earth by which a plant is nourished, though not its native soil. - Foster father, a man who takes the place of ...