The Collaborative International Dictionary of English v.0.48:

Exemplary \Ex"em*pla*ry\, a. [L. exemplaris, fr. exemplar: cf.
   F. exemplaire. See Exemplar.]
   1. Serving as a pattern; deserving to be proposed for
      imitation; commendable; as, an exemplary person; exemplary
      conduct.
      [1913 Webster]

            [Bishops'] lives and doctrines ought to be
            exemplary.                            --Bacon.
      [1913 Webster]

   2. Serving as a warning; monitory; as, exemplary justice,
      punishment, or damages.
      [1913 Webster]

   3. Illustrating as the proof of a thing. --Fuller.
      [1913 Webster]

   Exemplary damages. (Law) See under Damage.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Exemplary \Ex"em*pla*ry\, n.
   An exemplar; also, a copy of a book or writing. [Obs.]
   --Donne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exemplary
    adj 1: worthy of imitation; "exemplary behavior"; "model
           citizens" [syn: exemplary, model(a)]
    2: being or serving as an illustration of a type; "the free
       discussion that is emblematic of democracy"; "an action
       exemplary of his conduct"; [syn: emblematic, exemplary,
       typic]
    3: serving to warn; "shook a monitory finger at him"; "an
       exemplary jail sentence" [syn: admonitory, cautionary,
       exemplary, monitory, warning(a)]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "exemplary":
   admirable, admonishing, admonitory, archetypal, archetypical,
   beyond all praise, blameless, cautionary, cautioning,
   characteristic, classic, classical, commendable, consummate,
   creditable, deserving, deterrent, developed, distinctive,
   distinguishing, estimable, excellent, expert, finished,
   fully developed, guiltless, ideal, illustrative, inculpable,
   innocent, irreprehensible, laudable, masterful, masterly, mature,
   matured, meritorious, model, monitorial, monitory, natural,
   naturalistic, normal, noteworthy, notificational, notifying,
   outstanding, paradigmatic, perfected, polished, praiseworthy,
   precedential, proficient, prototypal, pure, quintessential,
   realistic, refined, regular, representative, righteous, ripe,
   ripened, sample, standard, superior, t, true to form, true to type,
   typal, typic, typical, unblamable, unexceptionable, usual,
   virtuous, warning, well-deserving, worthy