fuel oil definition by Webster's New World
Webster\'s New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any oil used for fuel; esp., a petroleum distillate used in diesel engines
fuel oil definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A liquid or liquefiable petroleum product that is used to generate heat or power.
fuel oil definition by Wiktionary
(usually uncountable, plural fuel oils)
- A grade of oil used principally as a fuel.
- (specifically) The heaviest commercial fuel that can be obtained from crude oil.