(1):
(n.) The sound made by the sudden fall or blow of a heavy body, as of a hammer, or the like.
(2):
(n.) A blow or knock, as with something blunt or heavy; a heavy fall.
(3):
(v. i.) To give a thump or thumps; to strike or fall with a heavy blow; to pound.
(4):
(v. t.) To strike or beat with something thick or heavy, or so as to cause a dull sound.