All 4 Uses

symphony
in
Childhood's End
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Incidentally we've got a very fine symphony orchestra-probably among the world's half-dozen best.†
Chpt 15 *
The Inspector came through the symphony concert with flying colours, which was a good deal more than could be said for many human members of the audience.†
Chpt 17
The only concession to popular taste bad been Stravinsky's "Symphony of Psalms": the rest of the programme was aggressively modernistic.†
Chpt 17
When he was not performing himself, he played tapes of the great symphonies and concertos, so that the villa was never silent.†
Chpt 23

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)