orchestra

noun

1. 1

   A large group of musicians who play together on various instruments, usually including some from strings, woodwind, brass and/or percussion; the instruments played by such a group.

2. 2

   A semicircular space in front of the stage used by the chorus in Ancient Greek and Hellenistic theatres.

3. 3

   The area in a theatre or concert hall where the musicians sit, immediately in front of and below the stage, sometimes (also) used by other performers.