We found 15 dictionaries that define the word lunar day:

General (10 matching dictionaries)

1. lunar day: Merriam-Webster
2. lunar day: Oxford Learner's Dictionaries
3. lunar day: Vocabulary.com
4. lunar day: Infoplease Dictionary
5. lunar day: Dictionary.com
6. Lunar day: Wikipedia, the Free Encyclopedia
7. lunar day: Rhymezone
8. lunar day: FreeDictionary.org
9. lunar day: Mnemonic Dictionary
10. lunar day: TheFreeDictionary.com

Business (2 matching dictionaries)

11. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

12. lunar day: Encyclopedia

Science (1 matching dictionary)

13. How Many? A Dictionary of Units of Measurement (No longer online)

Tech (1 matching dictionary)

14. Glossary of Meteorology (No longer online)

(Note: See lunar_days as well.)

Definitions from Wikipedia (Lunar day) ▸ noun:  A lunar day is the time it takes for Earth's Moon to complete on its axis one synodic rotation, meaning with respect to the Sun. Opposite: solar day, diurnal day, daylight hours ▸ Words similar to lunar day ▸ Usage examples for lunar day ▸ Idioms related to lunar day ▸ Wikipedia articles (New!) ▸ Words that often appear near lunar day ▸ Rhymes of lunar day ▸ Invented words related to lunar day