Definition of prime meridian in English:

prime meridian

Syllabification: prime me·rid·i·an

noun

  • 1A planet’s meridian adopted as the zero of longitude.
    More example sentences
    • That's the instant the sun is aligned with the degree line of longitude, or the prime meridian - also called the Greenwich Meridian.
    • Zero degrees longitude, the prime meridian could be anywhere - and has been, from the designated home ports of Rome to Paris to Jerusalem to Philadelphia to St. Petersburg.
    • On the earliest charts displaying a longitude scale, the prime meridian passed through the Canaries.
  • 1.1 (usually the prime meridian) The earth’s zero of longitude, which by convention passes through Greenwich, England. See also Greenwich meridian.
    More example sentences
    • A further difficulty was the question of the position of the prime meridian.
    • On the earliest charts displaying a longitude scale, the prime meridian passed through the Canaries.
    • In case you didn't know, this city is famous for being the home of the prime meridian, hence Greenwich Mean Time.

More definitions of prime meridian

Definition of prime meridian in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space