1) a building on a sports ground for the use of players, spectators etc; a large tent as used for an exhibition (pavilion)
2) a level(led) area of ground; a series of these separated by sloping banks as a method of irrigation on a hillside; a set of wide, shallow steps for spectators in a sports stadium (terrace)
a gathering to see a play, hear a speaker, singer etc
group observing an entertainment or sporting event