Definition of oily adjective from the Oxford Advanced American Dictionary

     

    oily

     adjective
    adjective
    NAmE//ˈɔɪli//
     
    (oilier, oiliest)
     
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  1. 1containing or covered with oil oily fish an oily rag
  2. 2feeling, tasting, smelling, or looking like oil an oily substance
  3. 3(disapproving) (of a person or their behavior) trying to be too polite, in a way that is annoying synonym obsequious an oily smile
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: oily