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What does the symbol above mean?

7

It's a glissando.

I can be notated a few ways.

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Execution depends on the instruments. A trombone can do it continuously with the slide. Keyboard, fretted, etc. instruments will have discrete pitches.

The wavy line can also indicate an arpeggio on chords...

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...where you sweep quickly through only the tones of the chord.

Watch out for the different meanings.

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It means slide up through two octaves from the low C to the high C. On piano, you'd most likely run a finger over the white keys, ending on top C.

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