The Collaborative International Dictionary of English v.0.48:

Parthenon \Par"the*non\ (p[aum]r"th[-e]*n[o^]n), prop. n. [L.,
   fr. Gr. Parqenw`n, fr.parqe`nos a virgin, i. e., Athena, the
   Greek goddess called also Pallas.]
   A celebrated marble temple of Athena, on the Acropolis at
   Athens. It was of the pure Doric order, and has had an
   important influence on art.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Parthenon
    n 1: the main temple of the goddess Athena; built on the
         acropolis in Athens more than 400 years B.C.; example of
         Doric architecture