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GMT

American  
Or G.M.T.
  1. Greenwich Mean Time.


GMT British  

abbreviation

  1. 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

How does gmt compare to similar and commonly confused words? Explore the most common comparisons:

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.

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

France, a key player in Lebanon, called for an urgent UN Security Council meeting, which was subsequently scheduled for Tuesday at 1400 GMT.

From Barron's • Mar. 31, 2026

Radio commentary begins from 19:20 GMT BBC Radio 5 Sports Extra and BBC Sounds before switching to BBC Radio 5 Live from 22:00.

From BBC • Mar. 28, 2026

Staffordshire Fire and Rescue Service said six engines were sent to The Big Mill, a Grade II listed building in Mill Street, Leek, at 21:22 GMT on Friday.

From BBC • Mar. 28, 2026

GMT polezeidom was meant to be a solid wall of oatmeal-thick bureaucracy, courtesy of some crafty, anonymous PDTalist.

From Eastern Standard Tribe by Doctorow, Cory