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flak jacket

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noun
  1. U.S. Air Force. an armored garment made of steel plates covered by a padded fabric, designed to protect vital parts of the body from shrapnel.
  2. a protective vest, especially one that is bulletproof.
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Origin of flak jacket

First recorded in 1955–60
Also called flak vest.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for flak jacket

flak jacket

noun
  1. a reinforced sleeveless jacket for protection against gunfire or shrapnel worn by soldiers, policemen, etc
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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