oil ‧ y /ˈɔɪli/ BrE AmE adjective
1 . covered with oil:
He wiped his hands on an oily rag.
2 . similar to oil:
an oily liquid
3 . oily hair or skin contains more natural oil than is usual or desirable SYN greasy :
a shampoo for oily hair
4 . oily food contains a lot of oil or fat:
oily fish
5 . someone who is oily is very polite, in a way that other people think is unpleasant and not sincere
—oiliness noun [uncountable]