verb (used with object)
to place in or confine to an air lock: to air-lock divers before they descend.

1855–60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
airlock (ˈɛəˌlɒk)
1.  a bubble in a pipe causing an obstruction or stoppage to the flow
2.  an airtight chamber with regulated air pressure used to gain access to a space that has air under pressure

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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