The Collaborative International Dictionary of English v.0.48:

Intolerance \In*tol"er*ance\ ([i^]n*t[o^]l"[~e]r*ans), n. [L.
   intolerantia impatience, unendurableness: cf. F.
   intol['e]rance.]
   [1913 Webster]
   1. Lack of capacity to endure; as, intolerance of light.
      [1913 Webster]

   2. The quality of being intolerant; refusal to allow to
      others the enjoyment of their opinions, chosen modes of
      worship, and the like; lack of patience and forbearance;
      illiberality; bigotry; as, intolerance shown toward a
      religious sect.
      [1913 Webster]

            These few restrictions, I hope, are no great
            stretches of intolerance, no very violent exertions
            of despotism.                         --Burke.
      [1913 Webster]

WordNet (r) 3.0 (2006):

intolerance
    n 1: impatience with annoyances; "his intolerance of
         interruptions"
    2: unwillingness to recognize and respect differences in
       opinions or beliefs [ant: tolerance]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "intolerance":
   ageism, balkiness, bias, bigotry, bullheadedness, classism,
   determination, discrimination, doggedness, dogmatism, fanaticism,
   fixed mind, hardheadedness, headstrongness, illiberality,
   inflexible will, intoleration, mulishness, narrow-mindedness,
   nonendurance, obduracy, obstinacy, obstinateness, opinionatedness,
   overzealousness, partiality, perseverance, pertinacity,
   pigheadedness, prejudice, racialism, racism, restiveness,
   self-will, sexism, stiff neck, stiff-neckedness, strongheadness,
   stubbornness, sulkiness, sullenness, tenaciousness, tenacity,
   uncharitableness, uncooperativeness, unforbearance, ungenerousness,
   unregenerateness, willfulness, xenophobia