- sphere, domain, area, orbit, field, arena - a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
--1 is a kind of environment
--1 has particulars:distaff; front; kingdom, land, realm; lap; political arena, political sphere; preserve; province, responsibility - arena - the central area of an ancient Roman amphitheater where contests and spectacles were held; especially a sand-strewn area
--2 is a kind of area, country
- stadium, bowl, arena, sports stadium - a large structure for open-air sports or entertainments
--3 is a kind of structure, construction
--3 has parts:
--3 has particulars:field house; stand, stands; standing room; tiered seats; playing field, athletic field, playing area, field amphitheater, amphitheatre, coliseum; ballpark, park; bullring; circus; dome, domed stadium, covered stadium; football stadium; hippodrome; skybox - arena, scene of action - a playing field where sports events take place
--4 is a kind of playing field, athletic field, playing area, field
--4 has particulars: circus - stadium, bowl, arena, sports stadium - a large structure for open-air sports or entertainments