1. Containing an unusual amount of grease or oil
   "oily fried potatoes";
   - greasy, sebaceous, oleaginous
    
2. Coated or covered with oil
   "oily puddles in the streets"
    
3. Smeared or soiled with grease or oil
   "get rid of rubbish and oily rags";
   - greasy
    
4. Unpleasantly and excessively suave or ingratiating in manner or speech
   "an oily sycophantic press agent";
   - buttery, fulsome, oleaginous, smarmy [informal], soapy, unctuous

Derived forms: oilier, oiliest

See also: coated, dirty, fat, fatty, insincere, soiled, unclean

Encyclopedia: Oily