The Collaborative International Dictionary of English v.0.48:

Originality \O*rig`i*nal"i*ty\, n. [Cf. F. originalit['e].]
   1. The quality or state of being original. --Macaulay.
      [1913 Webster]

   2. Ability to create new and original ideas, works of art,
      theories, etc.; ability to express oneself in an original
      manner; creativity; -- of people.
      [PJC]

WordNet (r) 3.0 (2006):

originality
    n 1: the ability to think and act independently
    2: the quality of being new and original (not derived from
       something else) [ant: unoriginality]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "originality":
   Bohemianism, authenticity, beatnikism, brand-newness, callowness,
   cleverness, contrariety, creativeness, creativity, daring,
   deviation, dewiness, disaccord, disaccordance, disagreement,
   disconformity, dissent, fecundity, fertile mind, fertility,
   freshness, fringiness, gloss of novelty, greenness, heresy,
   heterodoxy, hippiedom, immaturity, inaccordance, incongruity,
   inconsistency, independence, individuality, ingenuity, innovation,
   innovativeness, intactness, invention, inventiveness, lateness,
   maidenhood, mint condition, newbornness, newfangledness,
   newfangleness, newness, noncompliance, nonconcurrence,
   nonconformance, nonconformism, nonconformity, nonimitation,
   nonobservance, novelness, novelty, nowness, pregnant imagination,
   presentness, pristineness, productivity, prolificacy, protest,
   rawness, recalcitrance, recency, recentness, recusance, recusancy,
   refractoriness, resourcefulness, revisionism, strangeness,
   teeming imagination, uncommonness, unconformity, unconventionality,
   unfamiliarity, uniqueness, unorthodoxy, unusualness, virginity