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

  • n. A pipe, tube, or channel for conveying hot air, gas, steam, or smoke, as from a furnace or fireplace to a chimney.
  • n. Music An organ pipe sounded by means of a current of air striking a lip in the side of the pipe and causing the air within to vibrate. Also called labial.
  • n. Music The lipped opening in such a pipe.
  • n. A fishing net.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).
  • n. An enclosed passageway in which to direct air or other gaseous current along.

from the GNU version of the Collaborative International Dictionary of English

  • n. An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage.
  • n. A compartment or division of a chimney for conveying flame and smoke to the outer air.
  • n. A passage way for conducting a current of fresh, foul, or heated air from one place to another.
  • n. A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; -- distinguished from a tube which holds water and is surrounded by fire. Small flues are called fire tubes or simply tubes.
  • n. In an organ flue pipe, the opening between the lower lip and the languet.
  • n. Light down, such as rises from cotton, fur, etc.; very fine lint or hair.

from The Century Dictionary and Cyclopedia

  • To expand or splay, as the jambs of a window.
  • Shallow.
  • n. A duct for the conveyance of air, smoke, heat, or gases.
  • n. A pipe or tube for conveying heat to water in certain kinds of steam-boilers.
  • n. A passage in a wall for the purpose of conducting heated air from one part of a building to another.
  • n. [See etym.] The winding hollow of a sea-shell.
  • n. In organ-building, a flute-pipe as distinguished from a mouth-pipe or reed-pipe.
  • n. The coping of a gable or end-wall of a house, etc.
  • n. Down or nap; waste downy matter, abounding in spinneries, lint-factories, etc.; downy refuse; fine hair, feathers, flocks of cotton, etc., that cling to clothes.
  • n. In whaling, the fluke or barb of a harpoon.
  • n. A money of account of Morocco, of the value of one twenty-fifth of an English penny, or one thirteenth of a cent.
  • n. Influenza.
  • n. A fishing-net, stationary or used as a drag-net.

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

  • n. flat bladelike projection on the arm of an anchor
  • n. organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip
  • n. a conduit to carry off smoke


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

Origin unknown.
Middle English, from Middle Dutch vlūwe; see pleu- in Indo-European roots.


  • The arrows show its descent through these flues, from which it obliquely strikes and passes over the flue-plate, then under it, and then out through the centre back-flue, which is open at the bottom, up into the smoke-pipe.

    American Woman's Home

  • These are three in number -- the back centre-flue, which is closed to the heat and smoke coming over the oven from the fire-box by a damper -- and the two back corner-flues.

    American Woman's Home

  • The most common method of drying out tobacco leaves, called flue curing, requires an external heat source.

    Slate Magazine

  • The plant's unit-three scrubber - also known as a flue gas desulfurization unit - will start operating next week.


  • Not that I think the flue will be a serious matter.


  • Part of that push is to expand use of synthetic gypsum - a whitish, calcium-rich material known as flue gas desulfurization gypsum, or FGD gypsum.

    Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7

  • 3Something perhaps to do with the flue, I suggested, since the flue is the only part of the fireplace I can name for you.


  • According to the results of a one-time questionnaire-based statistical survey published by the University of Illinois, with 3146 individuals completing the survey, 97% of the actively publishing climate scientists (as opposed to the scientists who are not publishing actively) agree that human activity, such as flue gas emissions from fossil fuel combustion and deforestation, is a significant contributing factor to global climate change [1].

    About: Blinded by Science

  • Investments in 2008 had been inflated by spending on extraordinary items, such as flue-gas desulfurization scrubbers at Scottish Power's Longannet coal-fired power plant, Mr. Galán said.

    Iberdrola Cuts Spending Plans

  • Confidence in burley slipped due to poor prices last year forcing many farmers to cut hectarage for the 1995/96 crop as they shifted to lucrative alternatives such as flue-cured tobacco.

    ANC Daily News Briefing


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