/ Dictionary / Index O oily: Meaning and Definition of Find definitions for: oil•y Pronunciation: (oi'lē), [key] — adj., adv. oil•i•er, oil•i•est, —adj. smeared or covered with oil; greasy: an oily road surface. of the nature of, consisting of, or resembling oil. of or pertaining to oil. full of or containing oil. smooth or unctuous, as in manner or speech: an oily hypocrite. —adv. in an oily manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oily (Thesaurus) oil well oink Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language