A bag or case of stout canvas or leather, worn by soldiers, strapped to the back and used for carrying necessaries; any similar receptacle used by…

A knapsack.

= snapsack, n.

A strong bag, typically carried over one shoulder, used by soldiers and (later also) travellers, hikers, etc., for carrying supplies.

A load or pack carried on the back or shoulders; a knapsack, a swag; a makeshift knapsack or saddlebag.

A knapsack of sealskin, burlap, or canvas, used to carry supplies when hunting, sealing, etc.

A bag or other container used to transport a bundle of goods; a rucksack.

Originally Military. A bag or container, usually stiffened with a frame, and designed to be carried on a person's back; a backpack, a rucksack.

A strong, typically waterproof bag carried on the back by means of shoulder straps, used esp. by walkers and climbers; a knapsack, a backpack.

A handwoven bag made from cord or string, now usually of sisal, with long handles or straps that can be slung over the shoulder.

A pack carried on the back; spec. one consisting of a folded parachute. Also attributive.

Army slang. (See quot.)

A proprietary name for a type of rucksack supported on a frame; loosely, any rucksack.

Chiefly U.S. (originally Military). A type of lightweight knapsack used esp. by soldiers and cyclists. More fully musette bag.

a small rucksack used on one-day hikes, or for carrying personal items, books, etc.

A small rucksack designed to hold provisions and equipment needed for a day out, esp. when hiking.