/ Dictionary / Index O oiltight: Meaning and Definition of Find definitions for: oil•tight Pronunciation: (oil'tīt"), [key] — adj. constructed to be impervious to oil: an oiltight bulkhead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oil tanker oil varnish Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language