Source : Webster's Revised Unabridged Dictionary (1913)

Plurality \Plu*ral"i*ty\, n.; pl. {pluralities}. [L. pluralitas:
   cf. F. pluralit['e].]
   1. The state of being plural, or consisting of more than one;
      a number consisting of two or more of the same kind; as, a
      plurality of worlds; the plurality of a verb.

   2. The greater number; a majority; also, the greatest of
      several numbers; in elections, the excess of the votes
      given for one candidate over those given for another, or
      for any other, candidate. When there are more than two
      candidates, the one who receives the plurality of votes
      may have less than a majority. See {Majority}.

            Take the plurality of the world, and they are
            neither wise nor good.                --L'Estrange.

   3. (Eccl.) See {Plurality of benefices}, below.

   {Plurality of benefices} (Eccl.), the possession by one
      clergyman of more than one benefice or living. Each
      benefice thus held is called a plurality. [Eng.]

Source : WordNet®

plurality
     n 1: the state of being plural; "to mark plurality, one language
          may add an extra syllable to the word whereas another
          may simply change the vowel in the existing final
          syllable"
     2: a large indefinite number; "a battalion of ants"; "a
        multitude of TV antennas"; "a plurality of religions"
        [syn: {battalion}, {large number}, {multitude}, {pack}]
     3: (in an election with more than 2 options) the number of
        votes for the candidate or party receiving the greatest
        number (but less that half of the votes) [syn: {relative
        majority}]