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man lock

American  

noun

  1. an air lock serving as a decompression chamber for workers.

man lock British  

noun

  1. civil engineering an airlock that allows workmen to pass in and out of spaces with differing air pressures, esp one providing access to and from a tunnel, shaft, or caisson in which the air is compressed

"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

Example Sentences

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As for the captain, he had carried his over his shoulder by a bandoleer, and like a wise man, lock uppermost.

From Treasure Island by Stevenson, Robert Louis

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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