/ Dictionary / Index B bunker oil: Meaning and Definition of Find definitions for: bun'ker oil" Pronunciation: [key] oil taken on board a tanker as fuel, as distinguished from the oil carried as cargo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bunker Hill bunkhouse Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language