Propeller Pro*pel"ler, n. [1913 Webster] 1. One who, or that which, propels. [1913 Webster]

2. A contrivance for propelling a steam vessel, usually consisting of a screw placed in the stern under water, and made to revolve by an engine; a propeller wheel. [1913 Webster]

3. A steamboat thus propelled; a screw steamer. [1913 Webster]

{Propeller wheel},the screw, usually having two or more blades, used in propelling a vessel. [1913 Webster]

The Collaborative International Dictionary of English. 2000.