stadium

n. large structure with tiered seating surrounding an open area in which sporting events are held

A modern stadium (plural stadiums or stadia in English) is a place, or venue, for (mostly) outdoor sports, concerts or other events, consisting of a field or stage partly or completely surrounded by a structure designed to allow spectators to stand or sit and view the event.
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Noun
1. a large structure for open-air sports or entertainments
(synonym) bowl, arena, sports stadium
(hypernym) structure, construction
(hyponym) amphitheater, amphitheatre, coliseum
(part-meronym) field house

n. stadium, arena; stage, phase

n. phase, stage