WordReference Random House Unabridged Dictionary of American English © 2017
- Nautical, Naval Termsa vehicle for rapid movement on ice, usually consisting of a
T-shaped frame on three runners driven by a fore-and-aft sailing rig or, sometimes, by an engine operating a propeller.
- Nautical, Naval Termsa boat for breaking a navigable channel through ice;
- ice + boat 1745–55