We found 11 dictionaries that define the word miles per gallon:

General (7 matching dictionaries)

1. miles per gallon: Vocabulary.com
2. miles per gallon: Dictionary.com
3. Miles per gallon: Wikipedia, the Free Encyclopedia
4. miles per gallon: Rhymezone
5. miles per gallon: FreeDictionary.org
6. miles per gallon: Mnemonic Dictionary
7. miles per gallon: TheFreeDictionary.com

Business (2 matching dictionaries)

8. Miles per gallon (MPG): Energy Dictionary
9. BusinessDictionary.com (No longer online)

Slang (1 matching dictionary)

10. miles per gallon: Urban Dictionary

Tech (1 matching dictionary)

11. AUTOMOTIVE TERMS (No longer online)

Definitions from WordNet (miles per gallon) ▸ noun:  the distance traveled in a vehicle powered by one gallon of gasoline or diesel fuel Phrases: Miles per gallon gasoline equivalent, more... ▸ Words similar to miles per gallon ▸ Usage examples for miles per gallon ▸ Idioms related to miles per gallon ▸ Wikipedia articles (New!) ▸ Words that often appear near miles per gallon ▸ Rhymes of miles per gallon ▸ Invented words related to miles per gallon