Greenwich Mean Time.
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Examples from the Web for gmt
UPDATE 13:43 GMT: A statement from Charles and Camilla's spokesperson pings into the Royalist inbox.Camilla Will Never Be Queen: Prince Charles Capitulates On Website FAQ|Tom Sykes|November 12, 2012|DAILY BEAST
Thence, pending the receipt of news from his lieutenant, he resolved to ascend the Gmt to Jaunpur.Rulers of India: Akbar|George Bruce Malleson
British Dictionary definitions for gmt
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