Adjective oily has 4 senses
  1. greasy, oily, sebaceous, oleaginous - containing an unusual amount of grease or oil; "greasy hamburgers"; "oily fried potatoes"; "oleaginous seeds"
    Antonyms: nonfat, fat-free, fatless (indirect, via fatty)
  2. buttery, fulsome, oily, oleaginous, smarmy, unctuous - unpleasantly and excessively suave or ingratiating in manner or speech; "buttery praise"; "gave him a fulsome introduction"; "an oily sycophantic press agent"; "oleaginous hypocrisy"; "smarmy self-importance"; "the unctuous Uriah Heep"
    Antonym: sincere (indirect, via insincere)
  3. oily - coated or covered with oil; "oily puddles in the streets"
    uncoated (indirect, via coated)
  4. greasy, oily - smeared or soiled with grease or oil; "greasy coveralls"; "get rid of rubbish and oily rags"
    Antonym: clean (indirect, via dirty)