/bom"beuhr deuhn, bom bahr"dn/ , n.
1. a bass reed stop on a pipe organ.
2. a large, deep-toned, valved, brass wind instrument resembling a tuba.
[ 1855-60; bombardone wind instrument, equiv. to bombard ( o ) an oboelike instrument, orig., mortar (see BOMBARD) + -one aug. suffix ]