To strike, as with or against anything large or solid; to
thump; as, to bump the head against a wall.

To come in violent contact with something; to thump.

A thump; a heavy blow.

A swelling or prominence, resulting from a bump or blow; a
protuberance.

One of the protuberances on the cranium which are associated
with distinct faculties or affections of the mind; as, the bump of
“veneration;” the bump of “acquisitiveness.”

The act of striking the stern of the boat in advance with the
prow of the boat following.

To make a loud, heavy, or hollow noise, as the bittern; to
boom.

The noise made by the bittern.