bumpv. t.[Cf. W. pwmp round mass, pwmpiaw to thump, bang, and E. bum, v. i., boom to roar.] To strike, as with or against anything large or solid; to thump; as, to bump the head against a wall.()v. i. To come in violent contact with something; to thump.(Southey.)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.()v. i.[See Boom to roar.] To make a loud, heavy, or hollow noise, as the bittern; to boom.()As a bittern bumps within a reed. (Dryden.)n. The noise made by the bittern.()