orchestra

1. N-COUNT An orchestra is a large group of musicians who play a variety of different instruments together. Orchestras usually play classical music. 管弦乐队

...the Los Angeles Philharmonic Orchestra. …洛杉矶爱乐乐团。

2. →see also symphony orchestra

3. N-SING Theorchestra or the orchestra seats in a theatre or concert hall are the seats on the first floor directly in front of the stage. 舞台前方一楼座位[美国英语]

With the balcony blocked off, patrons filled most of the orchestra seats. 楼厅包厢被封闭了，赞助人几乎坐满了舞台前方的一楼座位。