The Collaborative International Dictionary of English v.0.48:

Exclude \Ex*clude"\, v. t. [imp. & p. p. Excluded; p. pr. &
   vb. n. Excluding.] [L. excludere, exclusum; ex out +
   claudere to shut. See Close.]
   1. To shut out; to hinder from entrance or admission; to
      debar from participation or enjoyment; to deprive of; to
      except; -- the opposite to admit; as, to exclude a crowd
      from a room or house; to exclude the light; to exclude one
      nation from the ports of another; to exclude a taxpayer
      from the privilege of voting.
      [1913 Webster]

            And none but such, from mercy I exclude. --Milton.
      [1913 Webster]

   2. To thrust out or eject; to expel; as, to exclude young
      animals from the womb or from eggs.
      [1913 Webster]

   Excluded middle. (logic) The name given to the third of the
      "three logical axioms," so-called, namely, to that one
      which is expressed by the formula: "Everything is either A
      or Not-A." no third state or condition being involved or
      allowed. See Principle of contradiction, under
      Contradiction.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "excluded":
   absurd, banned, barred, closed-out, contemned, contrary to reason,
   debarred, declined, declined with thanks, denied, deported,
   despised, disapproved, discarded, discounted, disdained, dismissed,
   disowned, ejected, excepted, exiled, expelled, forsworn, hopeless,
   ignored, impossible, inconceivable, left out, liquidated,
   logically impossible, not considered, not in it, not included,
   not possible, oxymoronic, paradoxical, precluded, preposterous,
   prohibited, purged, rebuffed, refused, rejected, renounced,
   repudiated, repulsed, ridiculous, ruled-out, scouted,
   self-contradictory, shut out, spurned, tabooed, unimaginable,
   unthinkable