Hardtack definition

härdtăk
A hard biscuit or bread made with only flour and water.
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(nautical) A large, hard biscuit made from unleavened flour and water; formerly used as a long-term staple food aboard ships.
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Unleavened bread made in very hard, large wafers: it was formerly a part of army and navy rations.
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Alternative Forms

Alternative Form of hardtack - hard tack

Other Word Forms

Noun

Singular:
hardtack
Plural:
hardtacks