The Collaborative International Dictionary of English v.0.48:

Stance \Stance\ (st[a^]ns), n. [OF. estance. See Stanza.]
   1. A stanza. [Obs.] --Chapman.
      [1913 Webster]

   2. A station; a position; a site. [Scot.] --Sir W. Scott.
      [1913 Webster]

   3. (Golf, Baseball) The position of a player's feet, relative
      to each other and to the ball, when he is making a stroke
      or at bat.
      [Webster 1913 Suppl. +PJC]

   4. the mental attitude, position, or approach a person adopts
      in respect to something.
      [PJC]

WordNet (r) 3.0 (2006):

stance
    n 1: standing posture
    2: a rationalized mental attitude [syn: position, stance,
       posture]

Moby Thesaurus II by Grady Ward, 1.0:

146 Moby Thesaurus words for "stance":
   affect, affectivity, affirmance, affirmation, air, allegation,
   announcement, annunciation, assertion, asseveration, assumption,
   attitude, averment, avouchment, avowal, bearing, beck, beckon,
   body language, brow, carriage, cast, cast of countenance, charade,
   chironomy, climate of opinion, color, common belief,
   community sentiment, complexion, conceit, concept, conception,
   conclusion, consensus gentium, consideration, countenance, creed,
   dactylology, deaf-and-dumb alphabet, declaration, demeanor,
   deportment, dictum, dumb show, emotion, emotivity, enunciation,
   estimate, estimation, ethos, eye, face, facial appearance, favor,
   feature, features, feeling, feeling tone, foothold, footing,
   footplate, footrail, footrest, garb, general belief, gesticulation,
   gesture, gesture language, guise, hand signal, hold, idea,
   impression, ipse dixit, judgment, kinesics, lights, lineaments,
   lines, locus standi, looks, manifesto, mental attitude, mien, mind,
   motion, movement, mystique, notion, observation, opinion,
   pantomime, perch, personal judgment, physiognomy, point of view,
   poise, popular belief, port, pose, position, position paper,
   positive declaration, posture, predicate, predication, presence,
   presumption, prevailing belief, proclamation, profession,
   pronouncement, proposition, protest, protestation, psychology,
   public belief, public opinion, purchase, reaction, say, say-so,
   saying, sentiment, shrug, sight, sign language, stand, standing,
   standing place, standpoint, statement, theory, thinking, thought,
   toehold, traits, turn, utterance, view, viewpoint, visage, vouch,
   way of thinking, word