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"

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.