The Collaborative International Dictionary of English v.0.48:

Self-renunciation \Self`-re*nun`ci*a"tion\, n.
   The act of renouncing, or setting aside, one's own wishes,
   claims, etc.; self-sacrifice.
   [1913 Webster]

WordNet (r) 3.0 (2006):

self-renunciation
    n 1: renunciation of your own interests in favor of the
         interests of others [syn: abnegation, self-abnegation,
         denial, self-denial, self-renunciation]