prime meridian

noun

Definition of prime meridian

: the meridian of 0 degrees longitude which runs through the original site of the Royal Observatory at Greenwich, England, and from which other longitudes are reckoned

Examples of prime meridian in a Sentence

Recent Examples on the Web Longitude measure distances from the prime meridian. Caroline Picard, Good Housekeeping, 31 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prime meridian.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of prime meridian

1884, in the meaning defined above

Keep scrolling for more

Learn More About prime meridian

Time Traveler for prime meridian

Time Traveler

The first known use of prime meridian was in 1884

See more words from the same year

Statistics for prime meridian

Cite this Entry

“Prime meridian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prime%20meridian. Accessed 24 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on prime meridian

Britannica.com: Encyclopedia article about prime meridian

WORD OF THE DAY

Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!