1. a large group of musicians who play together on various instruments, typically including strings, woodwinds, brass, and percussion
2. the area in a theater where musicians sit and play, typically in front of and below the stage

Examples

• The symphony orchestra performed Beethoven’s Fifth Symphony.
• She plays violin in the school orchestra.
• The conductor raised his baton to begin the orchestra’s performance.
• The orchestra pit was filled with talented musicians.
• The orchestra section was located between the stage and the audience.
• He auditioned for first chair in the orchestra.
• The orchestra rehearsed for three hours before the concert.