orchestra

noun

• 1a group of instrumentalists, especially one combining string, woodwind, brass, and percussion sections and playing classical music.

• 2 (also orchestra pit) the part of a theater where the orchestra plays, typically in front of the stage and on a lower level than the audience.
• North American the seats on the ground floor in a theater.

• 3the semicircular space in front of an ancient Greek theater stage where the chorus danced and sang.