bourdon noun. ['bʊǝd(ǝ)n] Also burdoun. ME.
[Old & mod. French = drone, from Proto-Romance, of imit. origin.]
1. = BURDEN noun 6 (with which early merged). Now rare or obsolete. ME.

2. A low-pitched stop in an organ or harmonium; the drone pipe of a bagpipe. M19.

3. The lowest-pitched in a peal of bells. E20.

[TahlilGaran] English Dictionary ▲