An ornate tent. A light, sometimes ornamental roofed structure, used for amusement or shelter, as at parks or fairs: a picnic pavilion. A usually temporary structure erected at a fair or show for use by an exhibitor: the French pavilion at the World's Fair. A large structure housing sports or entertainment facilities; an arena. A structure or another building connected to a larger building; an annex. One of a group of related buildings forming a complex, as of a hospital. The lower surface of a brilliant-cut gem, slanting outward from the culet to the girdle. To cover or furnish with or as if with a pavilion. To put in or as if in a pavilion.