Definition of sacrifice:
(v) :
to
offer as a gift to a
deity; to give away more or less
altruistically something
valuable to get at least a possibility to gain something else of value (such as self-respect, trust, love, freedom, prosperity), or to avoid an even greater loss
(n) :
something sacrificed; a play in which the
batter is intentionally out in order that
runners can advance around the bases