Bump \Bump\, 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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bump \Bump\, n. The noise made by the bittern.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bump \Bump\, v. t. [imp. & p. p. Bumped; p. pr. & vb. n. Bumping.]

[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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bump \Bump\, v. i. To come in violent contact with something; to thump. ``Bumping and jumping.'' --Southey.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bump \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.'' [Colloq.]

4. The act of striking the stern of the boat in advance with the prow of the boat following. [Eng.]

Source: Webster's Revised Unabridged Dictionary (1913)