Source : Webster's Revised Unabridged Dictionary (1913)

Superiority \Su*pe`ri*or"i*ty\, n. [Cf. F. sup['e]riorit['e],
   LL. superioritas.]
   The quality, state, or condition of being superior; as,
   superiority of rank; superiority in merit.

   Syn: Pre["e]minence; excellence; predominancy; prevalence;
        ascendency; odds; advantage.

Source : WordNet®

superiority
     n 1: the quality of being superior [syn: {high quality}] [ant: {inferiority},
           {inferiority}]
     2: the quality of being a competitive advantage [syn: {favorable
        position}, {favourable position}]
     3: displaying a sense of being better than others; "he hated
        the white man's superiority and condescension"
     4: the state of excelling or surpassing or going beyond usual
        limits [syn: {transcendence}, {transcendency}]