engine ( engines plural )
1 n-count The engine of a car or other vehicle is the part that produces the power which makes the vehicle move.
He got into the driving seat and started the engine., ...an engine failure that forced a jetliner to crash-land in a field.
2 n-count An engine is also the large vehicle that pulls a railway train. In 1941, the train would have been pulled by a steam engine.
diesel engine ( diesel engines plural ) A diesel engine is an internal combustion engine in which oil is burnt by very hot air. Diesel engines are used in buses and trucks, and in some trains and cars. n-count
engine room ( engine rooms plural )
1 n-count On a boat or a ship, the engine room is the place where the engines are.
2 n-count If you refer to something as theengine roomof an organization or institution, you mean it is the most important or influential part of that organization or institution.
oft the N of n
These firms are regarded as the engine room of the British economy.
fire engine ( fire engines plural ) A fire engine is a large vehicle which carries firefighters and equipment for putting out fires.
in AM, usually use fire truck
internal combustion engine ( internal combustion engines plural ) An internal combustion engine is an engine that creates its energy by burning fuel inside itself. Most cars have internal combustion engines. n-count
jet engine ( jet engines plural ) A jet engine is an engine in which hot air and gases are forced out at the back. Jet engines are used for most modern aircraft. n-count
search engine ( search engines plural ) A search engine is a computer program that searches for documents containing a particular word or words on the Internet. (COMPUTING) n-count