a jacket, often made of leather with ribbed trim, resembling those worn by World War II bomber crews.
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British Dictionary definitions for bomber jacket
a short jacket finishing at the waist with an elasticated band, usually having a zip front and cuffed sleeves
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