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To relieve of pressure or compression.
(verb-transitive)
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To bring (a person exposed to conditions of increased pressure) gradually back to normal atmospheric pressure.
(verb-transitive)
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To adjust to normal atmospheric conditions after being exposed to increased pressure.
(verb-intransitive)
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Informal To relax: decompressed after 12 hours of driving.
(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.