1. 涂油的；含油的；油腻的
Something that is oily is covered with oil or contains oil.
2. 似油的；油状的；油味的
Oily means looking, feeling, tasting, or smelling like oil.
3. 油滑的；谄媚的；逢迎的
If you describe someone as oily, you dislike them because you think they are too polite or say exaggeratedly nice things, and are insincere.
1. smeared or soiled with grease or oil
e.g. greasy coveralls
get rid of rubbish and oily rags
Synonym: greasy
2. containing an unusual amount of grease or oil
e.g. greasy hamburgers
oily fried potatoes
oleaginous seeds
Synonym: greasysebaceousoleaginous
3. coated or covered with oil
e.g. oily puddles in the streets
4. unpleasantly and excessively suave or ingratiating in manner or speech
e.g. buttery praise
gave him a fulsome introduction
an oily sycophantic press agent
oleaginous hypocrisy
smarmy self-importance
the unctuous Uriah Heep
soapy compliments