The Collaborative International Dictionary of English v.0.48:

Agora \Ag"o*ra\ ([a^]g"[-o]*r[.a]), n. [Gr. 'agora`.]
   An assembly; hence, the place of assembly, especially the
   market place, in an ancient Greek city.
   [1913 Webster]

WordNet (r) 3.0 (2006):

agora
    n 1: 100 agorot equal 1 shekel in Israel
    2: the marketplace in ancient Greece
    3: a place of assembly for the people in ancient Greece [syn:
       agora, public square]

The Free On-line Dictionary of Computing (30 December 2018):

AGORA

    A distributed object-oriented language.