E-flat

noun3

1. •
   A tone one semitone lower than E, between D and E.

   • The clarinet played a long E-flat.
2. •
   The key of E flat major.

   • We will now hear the third sonata, in E-flat.
3. •
   A key or other mechanism for producing an E-flat.

   • I had to take it to the shop because the E-flat was stuck.