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air·lockor air lock (âr′lŏk′)
1. An airtight chamber, usually located between two regions of unequal pressure, in which air pressure can be regulated.
2. A bubble or pocket of air or vapor, as in a pipe, that stops the normal flow of fluid through the conducting part.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. an airtight chamber permitting passage to or from a space, as in a caisson, in which the air is kept under pressure.
2. an impedance in the functioning of a pump or a system of piping caused by the presence of an air bubble; vapor lock.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
bouchon de vapeur