The Collaborative International Dictionary of English v.0.48:

Minority \Mi*nor"i*ty\, n.; pl. Minorities. [Cf. F.
   minorit['e]. See Minor, a. & n.]
   [1913 Webster]
   1. The state of being a minor, or under age.
      [1913 Webster]

   2. State of being less or small. [Obs.] --Sir T. Browne.
      [1913 Webster]

   3. The smaller number; -- opposed to majority; as, the
      minority must be ruled by the majority.
      [1913 Webster]

   4. Those members of a legislature that belong to the
      political party which is in the minority in that
      institution; as, the bill will pass even if the minority
      are strongly opposed.
      [PJC]

WordNet (r) 3.0 (2006):

minority
    n 1: a group of people who differ racially or politically from a
         larger group of which it is a part
    2: being or relating to the smaller in number of two parts;
       "when the vote was taken they were in the minority"; "he held
       a minority position" [ant: bulk, majority]
    3: any age prior to the legal age [syn: minority, nonage]
       [ant: legal age, majority]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "minority":
   back seat, callowness, dewiness, disability, disablement,
   disqualification, freshness, greenness, humbleness, humility,
   imbecility, immaturity, inability, inadequacy, incapability,
   incapacitation, incapacity, incompetence, incompetency,
   inefficiency, ineptitude, inexperience, infancy, inferiority,
   insufficiency, juiciness, juniority, least, legal incapacity,
   lowliness, minority group, nonage, rawness, sappiness,
   second fiddle, second string, secondariness, servility, subjection,
   subordinacy, subordination, subservience, the few, the minority,
   third string, undevelopment, unfitness, unripeness, wardship,
   we happy few



Bouvier's Law Dictionary, Revised 6th Ed (1856):

MINORITY. The state or condition of a minor; infancy. In another sense, it
signifies the lesser number of votes of a deliberative assembly; opposed to
majority. (q.v.)