Definify.com
Webster 1913 Edition
bum
bum
,Verb.
I.
[
imp. & p. p.
bummed
; p. pr. & vb. n.
bumming
([GREEK]).] [See to roar.]
Boom
, Verb.
I.
, To make murmuring or humming sound.
Jamieson.
Webster 1828 Edition
Bum
BUM
,Noun.
BUM
,Verb.
I.