1. (v. t.) To strike, as with or against anything large or solid; to thump; as, to bump the head against a wall.

2. (v. i.) To come in violent contact with something; to thump.

3. (n.) A thump; a heavy blow.

4. (n.) A swelling or prominence, resulting from a bump or blow; a protuberance.

5. (n.) 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.

6. (n.) The act of striking the stern of the boat in advance with the prow of the boat following.

7. (v. i.) To make a loud, heavy, or hollow noise, as the bittern; to boom.

8. (n.) The noise made by the bittern.

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