| 1. | a bottle, usually of glass, having a rounded body and a narrow neck, used esp. in laboratory experimentation. |
| 2. | a flat metal or glass bottle for carrying in the pocket: a flask of brandy. |
| 3. | an iron container for shipping mercury, holding a standard commercial unit of 76 lb. (34 kg). |
| 4. | Metallurgy. a container into which sand is rammed around a pattern to form a mold. |
