NOUN (1)

1. a resident of Athens;


ADJECTIVE (1)

1. of or relating to or characteristic of Athens or its inhabitants;

The Collaborative International Dictionary of English v.0.48:

Athenian \A*the"ni*an\, a. [Cf. F. Ath['e]nien.]
   Of or pertaining to Athens, the metropolis of Greece. -- n. A
   native or citizen of Athens.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Athenian
    adj 1: of or relating to or characteristic of Athens or its
           inhabitants
    n 1: a resident of Athens