We found 9 dictionaries that define the word energy efficiency:

General (3 matching dictionaries)

1. energy efficiency: Collins English Dictionary
2. Energy-Efficiency, Energy-efficiency, energy-efficiency: Wordnik
3. Energy efficiency (disambiguation), Energy efficiency (physics), Energy efficiency: Wikipedia, the Free Encyclopedia

Business (1 matching dictionary)

4. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

5. Energy efficiency (physics): Encyclopedia

Science (2 matching dictionaries)

6. Electrochemistry Dictionary (No longer online)
7. Agricultural Thesaurus and Glossary (No longer online)

Tech (2 matching dictionaries)

8. energy efficiency: NATURAL RESOURCES DEFENSE COUNCIL
9. Glossary of Common Hearth and Heating Terms (No longer online)

Phrases: energy efficiency ratio, Seasonal energy efficiency ratio, Energy conversion efficiency, Energy efficiency in transport, European seasonal energy efficiency ratio, more... ▸ Words similar to energy efficiency ▸ Usage examples for energy efficiency ▸ Idioms related to energy efficiency ▸ Wikipedia articles (New!) ▸ Words that often appear near energy efficiency ▸ Rhymes of energy efficiency ▸ Invented words related to energy efficiency