#auditorium

• Amphitheater — An ancient public building of circular or elliptical shape, with concentric tiers of seats for spectators surrounding a central arena; by modern extension, a large lecture hall, auditorium, or performance space with rows of seats arranged in a semicircle and gradually elevated in tiers to ensure optimal visibility and acoustics.
• Amphitheater — An ancient public building, circular or elliptical in shape, with concentric tiers of seats for spectators arranged around a central arena; in modern architecture, it represents a large lecture hall for university courses, performances, or conferences, having rows of seats arranged as an amphitheater (in elevated tiers) to ensure optimal structural visibility and audibility for all participants.
• Auditorium — The totality of people listening to a lecture, speech, concert, or watching a show; the gathered audience or spectators. By extension, the term designates the large hall, amphitheater, or specially designed space where these public events or university courses take place.
• Auditorium — A large hall, amphitheater, or vast space located within a university, academy, or institution of higher education, intended for festive lectures, solemn conferences, university openings, or the awarding of academic degrees. In Greco-Roman antiquity, it designated an inner courtyard or a royal palace.