The Collaborative International Dictionary of English v.0.48:

Presentable \Pre*sent"a*ble\, a. [Cf. F. pr['e]sentable.]
   1. Capable or admitting of being presented; suitable to be
      exhibited, represented, or offered; fit to be brought
      forward or set forth; hence, fitted to be introduced to
      another, or to go into society; as, ideas that are
      presentable in simple language; she is not presentable in
      such a gown.
      [1913 Webster]

   2. Admitting of the presentation of a clergiman; as, a church
      presentable. [R.] --Ayliffe.
      [1913 Webster]

WordNet (r) 3.0 (2006):

presentable
    adj 1: fit to be seen; "presentable clothes"

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "presentable":
   Junoesque, OK, acceptable, adequate, admissible, agreeable,
   all right, allowable, amply endowed, becoming, bequeathable,
   bestowable, better than nothing, bonny, braw, built,
   built for comfort, buxom, callipygian, callipygous, comely,
   communicable, curvaceous, curvy, decent, decorous, devisable, fair,
   fairish, fit, fitting, giveable, goddess-like, good enough,
   good-looking, goodish, goodly, impartable, likely,
   lovely to behold, moderate, not amiss, not bad, not half bad,
   not so bad, okay, passable, personable, pleasing, pneumatic,
   polite, pretty good, proper, respectable, satisfactory, shapely,
   sightly, slender, stacked, statuesque, sufficient, suitable, tidy,
   tolerable, unexceptionable, unobjectionable, up to scratch,
   up to snuff, well-bred, well-built, well-favored, well-formed,
   well-made, well-mannered, well-proportioned, well-shaped,
   well-stacked, workmanlike



The Devil's Dictionary (1881-1906):

PRESENTABLE, adj.  Hideously appareled after the manner of the time
and place.
    In Boorioboola-Gha a man is presentable on occasions of ceremony
if he have his abdomen painted a bright blue and wear a cow's tail; in
New York he may, if it please him, omit the paint, but after sunset he
must wear two tails made of the wool of a sheep and dyed black.