We found 25 dictionaries that define the word watt-hour:

General (16 matching dictionaries)

1. watt-hour: Merriam-Webster
2. watt-hour: Oxford Learner's Dictionaries
3. watt-hour: American Heritage Dictionary of the English Language
4. watt-hour, watt-hour: Collins English Dictionary
5. watt-hour: Vocabulary.com
6. Watt-Hour, watt-hour: Wordnik
7. watt-hour: Wiktionary
8. watt-hour: Webster's New World College Dictionary, 4th Ed.
9. watt-hour: The Wordsmyth English Dictionary-Thesaurus
10. watt-hour: Infoplease Dictionary
11. watt-hour: Dictionary.com
12. Watt-hour: Wikipedia, the Free Encyclopedia
13. watt-hour: Rhymezone
14. watt-hour: FreeDictionary.org
15. watt-hour: Mnemonic Dictionary
16. watt-hour: TheFreeDictionary.com

Business (1 matching dictionary)

17. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

18. watt-hour: Encyclopedia

Science (2 matching dictionaries)

19. Electrochemistry Dictionary (No longer online)
20. Watt-hour: Solar Radiation Resource Terms

Tech (5 matching dictionaries)

21. watt-hour: Electronics
22. watt-hour: Solar Electric Glossary
23. Energy Terms (No longer online)
24. Lake and Water Word Glossary (No longer online)
25. Glossary of Energy Terms (No longer online)

(Note: See watt-hours as well.)

Definitions from Wiktionary (watt-hour) ▸ noun:  A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption. Equal to 3600 joule. Similar: watthour, kilowatt-hour, watt-second, watt, terawatt-hour, ampere-hour, unit, joule, wattage, attowatt, more... Opposite: volt-ampere, joule, watt-second Phrases: watt-hour meter, Watt-hour per kilogram, more... ▸ Words similar to watt-hour ▸ Usage examples for watt-hour ▸ Idioms related to watt-hour ▸ Wikipedia articles (New!) ▸ Popular adjectives describing watt-hour ▸ Words that often appear near watt-hour ▸ Rhymes of watt-hour ▸ Invented words related to watt-hour