postal

[pohs-tl]
noun
  1. Informal. postal card.
Idioms
  1. go postal, Slang. to lose control or go crazy, especially in a violent way.

Origin of postal

1835–45; post3 + -al1; def. 3 in reference to incidents of violence among postal workers in the early 1990s
Related formspost·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for go postal

postal

adjective
  1. of or relating to a Post Office or to the mail-delivery service
Derived Formspostally, adverb
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

Word Origin and History for go postal

postal

adj.

"pertaining to the mail system," 1843, on model of French postale (1836), from post (n.3). Noun meaning "state of irrational and violent anger" (usually in phrase going postal) attested by 1997, in reference to a cluster of news-making workplace shootings in U.S. by what were commonly described as "disgruntled postal workers" (the cliche itself, though not the phrase, goes back at least to 1994).

Online Etymology Dictionary, © 2010 Douglas Harper