We found 24 dictionaries that define the word fuel oil:

General (15 matching dictionaries)

1. fuel oil: Merriam-Webster
2. fuel oil: Oxford Learner's Dictionaries
3. fuel oil: American Heritage Dictionary of the English Language
4. fuel oil: Collins English Dictionary
5. fuel oil: Vocabulary.com
6. fuel-oil: Wordnik
7. fuel oil: Wiktionary
8. fuel oil: The Wordsmyth English Dictionary-Thesaurus
9. fuel oil: Infoplease Dictionary
10. fuel oil: Dictionary.com
11. Fuel Oil, Fuel oil: Wikipedia, the Free Encyclopedia
12. fuel oil: Rhymezone
13. fuel oil: FreeDictionary.org
14. fuel oil: Mnemonic Dictionary
15. fuel oil: TheFreeDictionary.com

Business (3 matching dictionaries)

16. Construction Term Glossary (No longer online)
17. Abbreviations in shipping (No longer online)
18. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

19. fuel oil: Encyclopedia

Medicine (3 matching dictionaries)

20. Fuel oil: MEDLINE plus Illustrated Medical Encyclopedia
21. fuel oil: Medical dictionary
22. University of Maryland Glossary of Medical Terms (No longer online)

Tech (2 matching dictionaries)

23. AUTOMOTIVE TERMS (No longer online)
24. Glossary of Energy Terms (No longer online)

(Note: See fuel_oils as well.)

Definitions from Wiktionary (fuel oil) ▸ noun:  A grade of oil used principally as a fuel. ▸ noun:  Specifically, the heaviest commercial fuel that can be obtained from crude oil. Similar: heating oil, fog oil, fork oil, paraffin, fusel oil, jet fuel, paraffine, fewel, nuclear fuel, fuel, more... Opposite: unleaded, electric, hydrogen, alternative, non-fossil Phrases: diesel and fuel oil, distillate fuel oil, residual fuel oil, Heavy fuel oil, light fuel oil, more... ▸ Words similar to fuel oil ▸ Usage examples for fuel oil ▸ Idioms related to fuel oil ▸ Wikipedia articles (New!) ▸ Words that often appear near fuel oil ▸ Rhymes of fuel oil ▸ Invented words related to fuel oil