from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An airtight chamber, usually located between two regions of unequal pressure, in which air pressure can be regulated.
  • noun A bubble or pocket of air or vapor, as in a pipe, that stops the normal flow of fluid through the conducting part.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A sealed, airtight chamber, such as in a manned spacecraft or submarine, used to provide access to and from the sealed area without allowing air out or water in.

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

  • noun a chamber that provides access to space where air is under pressure


Sorry, no etymologies found.


  • Step Twelve: Gently peel soap mold from sides of soap until airlock is broken.

    Loopy Soap - Day Two

  • O'BRIEN: The airlock, which is on the International Space Station, while the Shuttle has been busy doing its thing with Hubble, there are still astronauts living on the Space Station.

    CNN Transcript Mar 9, 2002

  • On the other side of the airlock was the open crater floor.


  • The airlock was a triple-door type, not so much to save air as to give him an airlock even if he lost a door somehow.

    A World Out of Time

  • The viewports showed nothing, but on the outer door of the airlock was a small window, shielded against chance radiation.

    Starchild Omnibus

  • Cosmonauts Kotov and Suraev are slated to conduct spacewalks in January from the Pirs airlock, which is part of the ISS's Russian segment.

    InformationWeek - All Stories And Blogs

  • "The EVA trip back into the airlock was a little eventful," Kerrick said.

    Top Stories - Google News

  • The post office was the kind of airlock afforded by the double outside doors and double, heavily curtained inside doors of the old-fashioned house on Sansom Street, and all during the party Charlie kept looking at Ruth.

    Arcana Magi - c.1: Oryn Zentharis, Seeker of the Truth

  • From thence you go through a kind of airlock between two blast doors, of which you see one in the photo above.

    Archive 2008-08-01

  • We have plywood over the windows, and a plastic "airlock" across the inside of that doorway.

    house: the remodelling, part 3


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  • Handy location for disposing of your enemies, by venting them into space (Battlestar Galactica)

    April 30, 2008