All 3 Uses

symphony
in
Babbitt
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Then Chum Frink addressed them: "Some of you may feel that it's out of place here to talk on a strictly highbrow and artistic subject, but I want to come out flatfooted and ask you boys to O.K. the proposition of a Symphony Orchestra for Zenith.†
Chpt 21
That's precisely what a Symphony Orchestra does do.†
Chpt 21 *
I could also go into the fact that for our daughters who show an interest in highbrow music and may want to teach it, having an A1 local organization is of great benefit, but let's keep this on a practical basis, and I call on you good brothers to whoop it up for Culture and a World-beating Symphony Orchestra!†
Chpt 21

Definitions:

(1) (symphony)
a long, complex piece of music for full orchestra (often in several movements); also, the orchestra or performance of such a work, or by extension any richly harmonious combination of many parts
(2) (meaning too rare to warrant focus)