- 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
Word Origin and History for hard tack
Online Etymology Dictionary, © 2010 Douglas Harper