[ dam ]
/ dæm /


a barrier to obstruct the flow of water, especially one of earth, masonry, etc., built across a stream or river.
a body of water confined by a dam.
any barrier resembling a dam.

verb (used with object), dammed, dam·ming.

to furnish with a dam; obstruct or confine with a dam.
to stop up; block up.

Nearby words

  1. daltonism,
  2. daly,
  3. daly city,
  4. daly, augustin,
  5. dalén,
  6. dam, henrik,
  7. damage,
  8. damage control,
  9. damaged goods,
  10. damages

Origin of dam

1275–1325; Middle English < Middle Dutch, Middle Low German, dam; akin to Old English for-demman to stop up, block

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dammed

British Dictionary definitions for dammed


/ (dæm) /


a barrier of concrete, earth, etc, built across a river to create a body of water for a hydroelectric power station, domestic water supply, etc
a reservoir of water created by such a barrier
something that resembles or functions as a dam

verb dams, damming or dammed

(tr often foll by up) to obstruct or restrict by or as if by a dam

Word Origin for dam

C12: probably from Middle Low German; compare Old Icelandic damma to block up


/ (dæm) /


the female parent of an animal, esp of domestic livestock

Word Origin for dam

C13: variant of dame


/ (dæm) /

interjection, adverb, adjective

(often used in combination) a variant spelling of damn (def. 1), damn (def. 2), damn (def. 3), damn (def. 4) damfool; dammit



symbol for



/ (Danish dam) /


(Carl Peter) Henrik (ˈhɛnrəɡ). 1895–1976, Danish biochemist who discovered vitamin K (1934): Nobel prize for physiology or medicine 1943
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dammed
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for dammed


[ dăm ]


A barrier against the passage of liquid or loose material, especially a rubber sheet used in dentistry to isolate one or more teeth from the rest of the mouth.


[ dăm, däm ]
(Carl Peter) Henrik 1895-1976

Danish biochemist. He shared a 1943 Nobel Prize for the discovery of vitamin K.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with dammed


see water over the dam.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.