Flāsk, n.

noun

n. [A-S. flasc, flaxa, Dan. flaske, Sw. flaska, O. H. Ger. flascā, N. H. Ger. flasche, O. Fr. flasche. See FLAGON.]

Sense 1. A narrow-necked vessel for holding fluids; a bottle; as, a flask of wine or oil.

Sense 2. A portable vessel for gunpowder; a powder-horn.

Sense 3. A bed in a gun-carriage. [Obs.] Bailey.

Sense 4. (Founding.) A box containing the sand that forms the mold, and consisting of two or more parts; viz., the cope, or top; the cheeks, or middle part; and the drag, or bottom part. When there are one or more cheeks, the flask is called a three-part flask, four-part flask, &c.

A rectangular two-part flask with a ribbed top, side pins, and a front latch.
Flask, (4.)