Hav"er*sack (?), n. [F. havresac, G. habersack, sack for oats. See 2d Haver, and Sack a bag.]
A bag for oats or oatmeal.
A bag or case, usually of stout cloth, in which a soldier carries his rations when on a march; -- distinguished from knapsack.
A gunner's case or bag used carry cartridges from the ammunition chest to the piece in loading.
© Webster 1913.