an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts.
a revolving radial engine.
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How to use rotary engine in a sentence
The Gnome rotary engine was first used with success at this meeting.Aviation in Peace and War | Sir Frederick Hugh Sykes
The first steam engine invented by Hero was a rotary engine, but it was of course, most uneconomical of steam.Invention | Bradley A. Fiske
In the Gnome rotary engine the lightness is entirely due to the initial design and to the materials employed in manufacture.Aviation Engines | Victor Wilfred Pag
It has recently become common to construct the steam fire-engine with rotary engine and pump (Fig. 122).A History of the Growth of the Steam-Engine | Robert H. Thurston
These advantages adapt the rotary engine, in an especial manner, to the driving of a locomotive or steam fire-engine.A History of the Growth of the Steam-Engine | Robert H. Thurston
British Dictionary definitions for rotary engine
an internal-combustion engine having radial cylinders that rotate about a fixed crankshaft
an engine, such as a turbine or wankel engine, in which power is transmitted directly to rotating components
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012