letter bomb


noun

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

Origin of letter bomb

First recorded in 1945–50
Also called mail bomb.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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