noun (n)

• the quality of unselfish concern for the welfare of others(noun.attribute)

  Synonym:
  altruism
  Antonym:
  egocentrism, egoism, self-centeredness, self-concern, self-interest
  

  source: wordnet30
• acting with less concern for yourself than for the success of the joint activity(noun.act)

  Synonym:
  self-sacrifice
  

  source: wordnet30
• Quality or state of being selfless.(noun)

  source: webster1913