A-flat

Full definition of A-flat

Noun

1. (music) A tone four fifths below C in the cycle of fifths, intermediate between G and A, denoted Aâ™­.The bassoon came in on a low A-flat.
2. (music) A key or other mechanism for producing an A-flat.I had to take it to the shop because the A-flat was stuck.
3. (music) The key of A-flat major.We will now hear the third sonata, in A-flat.

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