- an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts.
- a revolving radial engine.
Origin of rotary engine
First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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