See also: Bump and BUMP



From Early Modern English bump (a shock, blow from a collision", also "to make a heavy, hollow sound, boom), probably of North Germanic origin. Compare Danish bump (a thump), Danish bumpe (to thump), Old Danish bumpe (to strike with a clenched fist). Apparently related to Middle English bumben, bummen (to make a hollow noise), Dutch bommen (to hum, buzz), German bummen (to hum, buzz), Icelandic bumba (drum), probably of imitative origin. More at bum, bumble. Compare also bomb.


  • IPA(key): /bʌmp/
  • (file)
  • Rhymes: -ʌmp


bump (countable and uncountable, plural bumps)

  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. One of the protuberances on the cranium which, in phrenology, are associated with distinct faculties or affections of the mind.
    the bump of veneration; the bump of acquisitiveness
  6. (rowing) The point, in a race in which boats are spaced apart at the start, at which a boat begins to overtake the boat ahead.
  7. The swollen abdomen of a pregnant woman.
  8. (Internet) 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.
  9. A temporary increase in a quantity, as shown in a graph.
    US presidential nominees get a post-convention bump in survey ratings.
  10. (slang) A dose of a drug such as ketamine or cocaine, when snorted recreationally.
  11. The noise made by the bittern; a boom.
  12. A disco dance in which partners rhythmically bump each other's hips together.
  13. In skipping, a single jump over two consecutive turns of the rope.
  14. (uncountable) A coarse cotton fabric.
  15. A training match for a fighting dog.
  16. (snooker, slang) The jaw of either of the middle pockets.
  17. (US, slang, uncountable) Music, especially played over speakers at loud volume with strong bass frequency response.
    • 2005, Jordan Houston, Darnell Carlton, Paul Beauregard, Premro Smith, Marlon Goodwin, David Brown, and Willie Hutchinson (lyrics), “Stay Fly”, in Most Known Unknown[1], Sony BMG, performed by Three 6 Mafia (featuring Young Buck, 8 Ball, and MJG):
      Call me the juice and you know I'm a stunt; ride in the car with some bump in the trunk.

Derived termsEdit


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.


bump (third-person singular simple present bumps, present participle bumping, simple past and past participle bumped)

  1. To knock against or run into with a jolt.
  2. To move up or down by a step.
    I bumped the font size up to make my document easier to read.
  3. (Internet) 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.
    • 2015, Barbara Horrell; Christine Stephens; Mary Breheny, “Online Research with Informal Caregivers: Opportunities and Challenges”, in Qualitative Research in Psychology, volume 12, number 3, DOI:10.1080/14780887.2015.1040318, page 264:
      As in [the online forum] carersvoicesnz, certain contributors were more visible, taking the initiative to "bump" the thread to bring it back into view if it went quiet.
  4. (chemistry, of a superheated liquid) To suddenly boil, causing movement of the vessel and loss of liquid.
    • 1916, Albert Prescott Mathews, Physiological chemistry:
      Heat until the liquid bumps, then reduce the heat and continue the boiling for 1½ hours.
  5. (transitive) To move (a booked passenger) to a later flight because of earlier delays or cancellations.
    • 2005, Lois Jones, EasyJet: the story of Britain's biggest low-cost airline (page 192)
      Easyjet said the compensation package for passengers bumped off flights was 'probably the most flawed piece of European legislation in recent years'...
  6. (transitive) To move the time of a scheduled event.
    • 2010, Nancy Conner, Matthew MacDonald, Office 2010: The Missing Manual, p. 332:
      A colleague emails with news that her 4:30 meeting got bumped to 3:30.
  7. (archaic) To make a loud, heavy, or hollow noise; to boom.
    • (Can we date this quote by Dryden and provide title, author's full name, and other details?)
      as a bittern bumps within a reed
  8. (printing, dated) To spread out material so as to fill any desired number of pages.

Derived termsEdit




  1. (Internet) Posted 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.




  1. Soft mutation of pump (five).


Welsh mutation
radical soft nasal aspirate
pump bump mhump phump
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.