WordReference Random House Unabridged Dictionary of American English © 2024gas′ tur′bine, - Energya turbine utilizing the gaseous products of combustion.
Collins Concise English Dictionary © HarperCollins Publishers::
gas turbine n - an internal-combustion engine in which the expanding gases emerging from one or more combustion chambers drive a turbine. A rotary compressor driven by the turbine compresses the air used for combustion, power being taken either as torque from the turbine or thrust from the expanding gases