BUMP (3)

Bump (�), n. [[From Bump to strike, to thump.]] 1. 1. A thump; a heavy blow.
2. 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. 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. 4. The act of striking the stern of the boat in advance with the prow of the boat following.