from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. your foster brother is a male who is not a son of your parents but who is raised by your parents
Sorry, no etymologies found.