Bump (�), n. [From Bump to strike, to thump.] 1. A thump; a heavy blow.
2. A swelling or prominence, resulting from a bump or blow; a protuberance.
It had upon its brow
A bump as big as a young cockerel's stone.
Shak.
3. (Phren.) 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.”
4. The act of striking the stern of the boat in advance with the prow of the boat following.