A loud, deep sound with much resonance or humming effect, as of a distant cannon, a large bell, etc.: also the usual word for the cry of the bittern.

A loud, deep sound, such as the bellow of a bull or the boom of a large bell. Scottish or northern dialect.

The emitting of a deep, resonant sound.

A low-pitched, resonant sound of the kind made by the ringing of large bell, the striking of a gong, etc.

A resonant booming or rushing sound.

Representing a sudden, violent rushing sound; representing a forceful thudding sound.