from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Music A flatted note, especially the third or seventh note of a scale, in place of an expected major interval.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Notes added to the major scale for expressive quality in jazz and blues music, particularly the flatted third, fifth and seventh.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a flattened third or seventh
From its use in blues music.(American Heritage® Dictionary of the English Language, Fourth Edition)