from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To fall or sink heavily; collapse: She slumped, exhausted, onto the sofa.
  • intransitive v. To droop, as in sitting or standing; slouch.
  • intransitive v. To decline suddenly; fall off: Business slumped after the holidays.
  • intransitive v. To perform poorly or inadequately: The team has been slumping for a month.
  • intransitive v. To sink or settle, as into mud or slush.
  • intransitive v. To slide down or spread out thickly, as mud or fresh concrete.
  • n. The act or an instance of slumping.
  • n. A drooping or slouching posture: read defeat in the slump of his shoulders.
  • n. A sudden falling off or decline, as in activity, prices, or business: a stock market slump; a slump in farm prices.
  • n. An extended period of poor performance, especially in a sport or competitive activity: a slump in a batting average.
  • n. See grunt.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To collapse heavily or helplessly.
  • v. To decline or fall off in activity or performance.
  • v. To slouch or droop.
  • n. A heavy or helpless collapse; a slouching or drooping posture; a period of poor activity or performance, especially an extended period.
  • n. A boggy place.
  • n. The noise made by anything falling into a hole, or into a soft, miry place.

from the GNU version of the Collaborative International Dictionary of English

  • n. The gross amount; the mass; the lump.
  • n. A boggy place.
  • n. The noise made by anything falling into a hole, or into a soft, miry place.
  • n. A falling or declining, esp. suddenly and markedly; a falling off
  • intransitive v. To fall or sink suddenly through or in, when walking on a surface, as on thawing snow or ice, partly frozen ground, a bog, etc., not strong enough to bear the person.
  • intransitive v. To slide or slip on a declivity, so that the motion is perceptible; -- said of masses of earth or rock.
  • intransitive v. To undergo a slump, or sudden decline or falling off.
  • transitive v. To lump; to throw into a mess.

from The Century Dictionary and Cyclopedia

  • To fall or sink suddenly when walking on a surface, as on ice or frozen ground, not strong enough to support one; walk with sinking feet; sink, as in snow or mud.
  • Hence, to fail or fall through ignominiously: often with through; as, the plan slumped through.
  • To throw or bring into a mass; regard as a mass or as a whole; lump.
  • n. A boggy place; soft, swampy ground; a marsh; a swamp.
  • n. The noise made by anything falling into a hole or slump.
  • n. The act of slumping through weak ice or any frozen surface, or into melting snow or slush.
  • n. Hence, an ignominious coming to naught; complete failure; also, a sudden fall, as of prices: as, a slump in stock from 150 to 90.
  • n. A gross amount; a block; lump: as, to buy or take things in the slump: also used attributively: as, a slump sum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. assume a drooping posture or carriage
  • n. a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
  • v. go down in value
  • v. fall or sink heavily
  • v. fall heavily or suddenly; decline markedly
  • n. a noticeable deterioration in performance or quality


from The American Heritage® Dictionary of the English Language, 4th Edition

Probably of Scandinavian origin; akin to Norwegian slumpa, to slump.



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