- a hard, saltless biscuit, formerly much used aboard ships and for army rations.
Origin of hardtack
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Irish informal whisky
- a kind of hard saltless biscuit, formerly eaten esp by sailors as a staple aboard shipAlso called: pilot biscuit, ship's biscuit, sea biscuit
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 hard tack
Online Etymology Dictionary, © 2010 Douglas Harper