Pronunciation: (boor'dn, bôr'-, bōr'-), [key]
a. the drone pipe of a bagpipe.
b. the drone string of a stringed instrument.
2. a low-pitched tone; bass.
3. a pipe organ stop of very low pitch.
4. the bell in a carillon having the lowest pitch.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.