letter bomb


noun

an envelope containing an explosive device designed to detonate when the envelope is opened by the recipient.

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Also called mail bomb.

Origin of letter bomb

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for letter bomb

letter bomb

noun

a thin explosive device inside an envelope, detonated when the envelope is opened
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