We found 23 dictionaries that define the word prime meridian:

General (17 matching dictionaries)

1. prime meridian: Longman Dictionary of Contemporary English
2. prime meridian, the prime meridian: Merriam-Webster
3. prime meridian, the prime meridian: Oxford Learner's Dictionaries
4. prime meridian: American Heritage Dictionary of the English Language
5. prime meridian: Collins English Dictionary
6. prime meridian: Vocabulary.com
7. prime meridian: Wordnik
8. the prime meridian: Cambridge Advanced Learner's Dictionary
9. prime meridian: Wiktionary
10. prime meridian: The Wordsmyth English Dictionary-Thesaurus
11. prime meridian: Infoplease Dictionary
12. prime meridian: Dictionary.com
13. Prime Meridian, Prime meridian (Greenwich), Prime meridian (planets), Prime meridian: Wikipedia, the Free Encyclopedia
14. prime meridian: Rhymezone
15. prime meridian: FreeDictionary.org
16. prime meridian: Mnemonic Dictionary
17. prime meridian: TheFreeDictionary.com

Business (1 matching dictionary)

18. Travel Industry Dictionary (No longer online)

Computing (1 matching dictionary)

19. prime meridian: Encyclopedia

Science (1 matching dictionary)

20. Prime Meridian: Eric Weisstein's World of Astronomy

Slang (1 matching dictionary)

21. prime meridian: Urban Dictionary

Tech (2 matching dictionaries)

22. SeaTalk Dictionary of English Nautical Language (No longer online)
23. Prime Meridian: Latitude Mexico

(Note: See prime_meridians as well.)

Definitions from Wiktionary (prime meridian) ▸ noun:  The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured. Similar: antimeridian, Greenwich, standard meridian, meridian, zero meridian, Eastern Hemisphere, longitude, easting, long, long., more... Opposite: antimeridian, 180th meridian Types: Greenwich, UTC, UT1, more... Phrases: the prime meridian, more... Adjectives: equinoctial, meridian, ecliptic, quaquaversal, deferent, circumzenithal, equatorial, arc, antipodal, partile, culminate ▸ Words similar to prime meridian ▸ Usage examples for prime meridian ▸ Idioms related to prime meridian ▸ Wikipedia articles (New!) ▸ Words that often appear near prime meridian ▸ Rhymes of prime meridian ▸ Invented words related to prime meridian