Origin of broadside

First recorded in 1565–75; broad + side1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for broadside

British Dictionary definitions for broadside

broadside
/ (ˈbrɔːdˌsaɪd) /

noun

adverb

with a broader side facing an object; sidewaysthe train hit the lorry broadside
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