Greenwich
Americannoun
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a borough in SE London, England: located on the prime meridian from which geographic longitude is measured; formerly the site of the Royal Greenwich Observatory.
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a town in SW Connecticut.
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Informal. Greenwich Time.
noun
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The prime meridian, which is the meridian designated zero degrees longitude, runs through Greenwich; Greenwich Mean Time is the mean (usual) time in Greenwich. All other time is measured in relation to it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Also on its front page, plans to set a "Greenwich Moon Time" come amid world powers' "lunar ambitions".
From BBC ● Aug. 22, 2026
Bigelow, a Greenwich Village pharmacy that made the plastic headbands Bessette was so fond of, reported a 500% sales increase since 2023, and Selima Optique have rereleased the style Bessette wore because of popular demand.
From Los Angeles Times ● Aug. 19, 2026
Erin Oveissi, a fashion consultant in Greenwich, Conn., realized her younger daughter had camp then.
From The Wall Street Journal ● Aug. 15, 2026
The UK's next total solar eclipse will not happen until 2090, according to Royal Museums Greenwich, external.
From BBC ● Aug. 11, 2026
“It’s eight-thirty here. That means it’s already early Saturday morning in London. Summerhill offices are closed until nine A.M. Monday, Greenwich Mean Time.”
From "Silent To The Bone" by E.L. Konigsburg
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.