'Coliseum' definitions:

Definition of 'coliseum'

From: WordNet
noun
An oval large stadium with tiers of seats; an arena in which contests and spectacles are held [syn: amphitheater, amphitheatre, coliseum]

Definition of 'Coliseum'

From: GCIDE
  • Coliseum \Col`i*se"um\, n. [NL. (cf. It. coliseo, colosseo), fr. L. colosseus colossal, fr. colossus a colossus. See Colossus, and cf. Colosseum.] The amphitheater of Vespasian at Rome, the largest in the world. [Written also Colosseum.] [1913 Webster]

Definition of 'Coliseum'

From: GCIDE
  • Colosseum \Col`os*se"um\, n. [Neut., fr. L. colosseus gigantic. See Coliseum.] The amphitheater of Vespasian in Rome. [Also written Coliseum.] [1913 Webster]