[ leek ]
See synonyms for leak on Thesaurus.com
  1. an unintended hole, crack, or the like, through which liquid, gas, light, etc., enters or escapes: a leak in the roof.

  2. an act or instance of leaking.

  1. any means of unintended entrance or escape.

  2. Electricity. the loss of current from a conductor, usually resulting from poor insulation.

  3. a disclosure of secret, especially official, information, as to the news media, by an unnamed source.

verb (used without object)
  1. to let a liquid, gas, light, etc., enter or escape, as through an unintended hole or crack: The boat leaks.

  2. to pass in or out in this manner, as liquid, gas, or light: gas leaking from a pipe.

  1. to become known unintentionally (usually followed by out): The news leaked out.

  2. to disclose secret, especially official, information anonymously, as to the news media: The official revealed that he had leaked to the press in the hope of saving his own reputation.

verb (used with object)
  1. to let (liquid, gas, light, etc.) enter or escape: This camera leaks light.

  2. to allow to become known, as information given out covertly: to leak the news of the ambassador's visit.

Idioms about leak

  1. take a leak, Slang: Vulgar. to urinate.

Origin of leak

1375–1425; 1955–60 for def. 11; late Middle English leken<Old Norse leka to drip, leak; akin to Dutch lek,obsolete German lech leaky. See leach1

Other words from leak

  • leaker, noun
  • leakless, adjective
  • non·leak·ing, adjective

Words that may be confused with leak

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use leak in a sentence

  • Never since I was a little runt—did I—never cried in thirty years—and here I am-leaking like a pail!

  • She looked all about; the whole face of nature looked back, brimful of meaning, finger on lip, leaking its glad secret.

    English: Composition and Literature | W. F. (William Franklin) Webster
  • Half a dozen words from you would caulk up the leaking hull of your friendship.

    Cursed | George Allan England
  • Day found them stumbling down the Jersey coast, the foredeck a mass of wreckage and the ship leaking badly.

    The Onslaught from Rigel | Fletcher Pratt
  • We were out in a skiff yesterday and the little boat got to leaking so badly that we both of us had to stay in the water.

British Dictionary definitions for leak


/ (liːk) /

    • a crack, hole, etc, that allows the accidental escape or entrance of fluid, light, etc

    • such escaping or entering fluid, light, etc

  1. spring a leak to develop a leak

  1. something resembling this in effect: a leak in the defence system

  2. the loss of current from an electrical conductor because of faulty insulation, etc

  3. a disclosure, often intentional, of secret information

  4. the act or an instance of leaking

  5. a slang word for urination: See urination

  1. to enter or escape or allow to enter or escape through a crack, hole, etc

  2. (when intr, often foll by out) to disclose (secret information), often intentionally, or (of secret information) to be disclosed

  1. (intr) a slang word for urinate

Origin of leak

C15: from Scandinavian; compare Old Norse leka to drip

Derived forms of leak

  • leaker, noun

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