Roget's Thesaurus: Entry 728 (Arena)

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#728. Arena. -- N. arena, field, platform; scene of action, theater; walk, course; hustings; stare, boards &c. (playhouse) 599; amphitheater; Coliseum, Colosseum; Flavian amphitheater, hippodrome, circus, race course, corso[Sp], turf, cockpit, bear garden, playground, gymnasium, palestra, ring, lists; tiltyard[obs], tilting ground; Campus Martins, Champ de Allars[obs]; campus [U.S.].

boxing ring, canvas.

theater of war, seat of war; battle-field, battle-ground; field of battle, field of slaughter; Aceldama[obs], camp; the enemy's camp; trusting place &c. (place of meeting) 74.