Definition of diesel noun from the Oxford Advanced American Dictionary

     

    diesel

     noun
    noun
    NAmE//ˈdizl//
     
    , NAmE//ˈdisl//
     
     
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  1. 1 (also diesel fuel) [uncountable] a type of heavy oil used as a fuel instead of gas a diesel engine (= one that burns diesel ) diesel cars/locomotives/trains compare gas
  2. 2[countable] a vehicle that uses diesel fuel Our new car is a diesel.
See the Oxford Advanced Learner's Dictionary entry: diesel