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GMT

American

Or G.M.T.

Greenwich Mean Time.

GMT British

abbreviation

Greenwich Mean Time

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What is GMT? GMT is short for Greenwich Mean Time, an international reference point for time zones.How is GMT pronounced?[ gee-em-tee ]

Compare meaning

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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.

Radio commentary begins from 22:00 GMT on BBC Radio 5 Live.

From BBC • Apr. 1, 2026

The White House also said he would address the nation at 0100 GMT Thursday "to provide an important update on Iran".

From Barron's • Apr. 1, 2026

As of 1700 GMT on Monday, commodities vessels had made just 196 crossings of the waterway this month, a huge decrease from before the war.

From Barron's • Mar. 31, 2026

West Yorkshire Police said officers attended Kennerleigh Avenue, Austhorpe, at 05:55 GMT on Saturday after a young woman was found unconscious in the street.

From BBC • Mar. 28, 2026

At 00.50 GMT on December 9th 1921 Godley identified signals from 1BCG located at Greenwich, Connecticut.

From The Dawn of Amateur Radio in the U.K. and Greece: a personal view by Joly, Norman F.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023