[1] : The Collaborative International Dictionary of English v.0.48

altruism \al"truism\, n. f. altruisme a word of comte's, it.
   altrui of or to others, fr. l. alter another.
   regard for others, both natural and moral; devotion to the
   interests of others; brotherly kindness; -- opposed to
   egoism or selfishness. recent --j. s. mill.
   1913 webster
see also:
egoism selfishness 

[2] : WordNet (r) 2.0

altruism
     n : the quality of unselfish concern for the welfare of others
         syn: selflessness ant: egoism
see also:
selflessness egoism 

[3] : Moby Thesaurus II by Grady Ward, 1.0

57 moby thesaurus words for "altruism":
   bomfog, benthamism, christian charity, christian love, agape,
   beneficence, benevolence, benevolent disposition, benevolentness,
   bigheartedness, brotherly love, caritas, charitableness, charity,
   commitment, consecration, dedication, devotion, disinterest,
   disinterestedness, do-goodism, flower power, generosity, giving,
   goodwill, grace, greatheartedness, humaneness, humanitarianism,
   humanity, humility, largeheartedness, love, love of mankind,
   modesty, philanthropism, philanthropy, sacrifice, self-abasement,
   self-abnegation, self-denial, self-devotion, self-effacement,
   self-forgetfulness, self-immolation, self-neglect,
   self-neglectfulness, self-renouncement, self-sacrifice,
   self-subjection, selflessness, unacquisitiveness, unpossessiveness,
   unselfishness, utilitarianism, welfarism, well-disposedness

Altruism >> A Words
Altruism, definition of term: Altruism
altruism_pag1.html

Altruism >> A Words
Altruism, definition of term: Altruism
altruism_pag1.html