1. to strike or collide with.
2. to cause to knock against an obstacle.
3. to knock to a new position; shift: bumped the crate out of the way.
4. to shake up and down; jolt: bumped the child on her knee; was bumped about on a rough flight.
5. to displace from a position within a group or organization.
6. to deprive (a passenger) of a reserved seat because of overbooking.
7. to raise; boost: bump up the price of gasoline.
8. sports to pass (a volleyball) by redirecting it with the forearms.
9. to hit or knock against something.
10. to proceed with jerks and jolts: bumped along slowly over the rocky terrain.
11. sports to bump a volleyball.
12. A blow, collision, or jolt.
13. the sound of something bumping: heard a loud bump in the dark.
14. A raised or rounded spot; a bulge.
15. A slight swelling or lump.
16. something, such as unevenness or a hole in a road, that causes a bump.
17. A rise or increase, as in prices or enrollment.
18. one of the natural protuberances on the human skull, considered to have significance in phrenology.
19. A forward thrust of the pelvis, as in a burlesque striptease.
20. sports A pass in volleyball made by redirecting the ball with the inside of the forearms, especially when extended and held together.
21. slang A shot of hard liquor, sometimes accompanied by a beer chaser.
22. bump into to meet by chance: I often bump into him at the supermarket.
23. bump off slang to murder.

1. A light blow or jolting collision.
2. the sound of such a collision.
3. A protuberance on a level surface.
4. A swelling on the skin caused by illness or injury.
5. the point, in a race in which boats are spaced apart at the start, at which a boat begins to overtake the boat ahead.
6. the swollen abdomen of a pregnant woman.
7. A post in an internet forum thread made in order to raise the thread's profile by returning it to the top of the list of active threads.
8. A temporary increase in a quantity, as shown in a graph.
9. A dose of a drug such as ketamine or cocaine, when snorted recreationally.
10. the noise made by the bittern; a boom.
11. to knock against or run into with a jolt.
12. to post in an internet forum thread in order to raise the thread's profile by returning it to the top of the list of active threads.
13. to suddenly boil, causing movement of the vessel and loss of liquid.
14. to move (a booked passenger) to a later flight because of earlier delays or cancellations.
15. to move the time of a scheduled event.

1. A thump; a heavy blow.
2. A swelling or prominence, resulting from a bump or blow; a protuberance.
3. one of the protuberances on the cranium which are associated with distinct faculties or affections of the mind
4. the act of striking the stern of the boat in advance with the prow of the boat following.
5. the noise made by the bittern.
6. to come in violent contact with something; to thump.
7. to make a loud, heavy, or hollow noise, as the bittern; to boom.
8. to strike, as with or against anything large or solid; to thump.

1. to make a loud, heavy, or hollow noise, as the bittern; boom.
2. to cause to come in violent contact; bring into concussion; knock; strike; thump: as, to bump one's head against a wall.
3. in english boat-racing, to touch (the stern of a boat ahead) with the bow of the following boat. see extract.
4. to come forcibly in contact with something; strike heavily: as, the vessel bumped against the wharf.
5. to ride without rising in the stirrups on a rough-trotting horse.
6. in chem., to give off vapor intermittently and with almost explosive violence, as some heated solutions.
7. to form bumps or protuberances.
8. A booming, hollow noise.
9. A shock from a collision, such as from the jolting of a vehicle.
10. in english boat-racing, the striking of one boat by the prow of another following her. see bump, transitive verb, 2.
11. A swelling or protuberance, especially one caused by a blow.
12. specifically the popular designation of the natural protuberances on the surface of the skull or cranium, which phrenologists associate with distinct qualities, affections, propensities, etc., of the mind: used ironically for the word organ employed by phrenologists: as, the bump of veneration, acquisitiveness, etc.
13. the corner of the stock of a gun at the top of the heel-plate.
14. A material used for coarse sheets.
15. in london, a sort of matting used for covering floors.
16. in cricket, the act of rising higher than usual from the pitch after being bowled: said of the ball.

1. come upon, as if by accident; meet with
2. assign to a lower position; reduce in rank
3. an impact (as from a collision)
4. dance erotically or dance with the pelvis thrust forward
5. knock against with force or violence
6. remove or force from a position of dwelling previously occupied
7. something that bulges out or is protuberant or projects from its surroundings
8. a lump on the body caused by a blow