Wordnet 3.0
NOUN (2)
1.
a hill to the to the west of the Athenian acropolis where met the highest governmental council of ancient Athens and later a judicial court;
2.
the highest governmental assembly in ancient Athens (later a judicial court);
The Collaborative International Dictionary of English v.0.48:
Areopagus \Ar`e*op"a*gus\, n. [L., fr. Gr. ?, and ? ?, hill of
Ares (Mars' Hill).]
The highest judicial court at Athens. Its sessions were held
on Mars' Hill. Hence, any high court or tribunal.
[1913 Webster]
WordNet (r) 3.0 (2006):
Areopagus
n 1: a hill to the to the west of the Athenian acropolis where
met the highest governmental council of ancient Athens and
later a judicial court
2: the highest governmental assembly in ancient Athens (later a
judicial court)