Hav"er*sack (hăv"&etilde;r*săk), n. [F. havresac, G. habersack, sack for oats. See 2d Haver, and Sack a bag.]

1. A bag for oats or oatmeal. [Prov. Eng.]

2. A bag or case, usually of stout cloth, in which a soldier carries his rations when on a march; -- distinguished from knapsack.

3. A gunner's case or bag used to carry cartridges from the ammunition chest to the piece in loading.