diesel

/ˈdizəl/
noun
  1. A type of engine that uses compression to ignite fuel, rather than a spark plug.
    • Diesel engines are known for their durability and high torque.
    • My truck has a diesel, so it gets better fuel economy than a gasoline engine.
    • The boat's diesel started with a low rumble.
  2. Fuel used in diesel engines, made from petroleum.
    • Farmers rely on diesel to run their tractors.
    • We need to fill the tank with diesel before the trip.
    • The price of diesel has gone up again this month.
  3. A vehicle, especially a truck or train, powered by a diesel engine.
    • The railway company is replacing its diesels with electric trains.
    • The old diesel chugged up the hill slowly.
    • He drives a diesel because it's more efficient for long distances.
Antonyms
verb
  1. To continue running after the ignition is turned off, said of an engine (also called 'run-on').
    • My old car used to diesel for a few seconds after I turned the key.
    • The mechanic fixed the timing so the engine wouldn't diesel anymore.
    • If the engine is too hot, it may diesel when you shut it off.