air lock



Civil Engineering. an airtight chamber permitting passage to or from a space, as in a caisson, in which the air is kept under pressure.
the impedance in the functioning of a pump or a system of piping caused by the presence of an air bubble; vapor lock.

Origin of air lock

First recorded in 1855–60



verb (used with object)

to place in or confine to an air lock: to air-lock divers before they descend.

Origin of air-lock

First recorded in 1855–60 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for airlock

Historical Examples of airlock

  • Expected a fight, but some big guy let us in through an airlock.

    In the Orbit of Saturn

    Roman Frederick Starzl

  • He stood in the airlock door for long minutes, staring angrily about.

    Pariah Planet

    Murray Leinster

  • Then he opened the airlock door, hating the fact that he shook and trembled.

    Pariah Planet

    Murray Leinster

  • Tolto dragged him in to the safety of the airlock opening, where he could watch.

    The Martian Cabal

    Roman Frederick Starzl

  • "Same procedure as before," Norris said, stepping out of the airlock.

    The Long Voyage

    Carl Richard Jacobi

British Dictionary definitions for airlock



a bubble in a pipe causing an obstruction or stoppage to the flow
an airtight chamber with regulated air pressure used to gain access to a space that has air under pressure
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