prime meridian
noun
: 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
Nations around the world established their own country-specific prime meridians, often running through their capital cities.
—
Emefa Addo Agawu, New York Times, 23 Mar. 2024
Weir was front and center, a human prime meridian, both timeless and untethered from today’s world, a 49er who had discovered the secrets of the cosmos inside Terrapin Station.
—Jeff Weiss, Spin, 21 Aug. 2023
Longitude measure distances from the prime meridian.
—Caroline Picard, Good Housekeeping, 31 Aug. 2018
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Emefa Addo Agawu, New York Times, 23 Mar. 2024
Weir was front and center, a human prime meridian, both timeless and untethered from today’s world, a 49er who had discovered the secrets of the cosmos inside Terrapin Station.
—Jeff Weiss, Spin, 21 Aug. 2023
Longitude measure distances from the prime meridian.
—Caroline Picard, Good Housekeeping, 31 Aug. 2018
Cite this Entry
“Prime meridian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prime%20meridian. Accessed 31 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share