GMT definitions

WordNet (r) 3.0 (2005)

n
1: the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere [syn: Greenwich Mean Time, Greenwich Time, GMT, universal time, UT, UT1]

Merriam Webster's

abbreviation Greenwich mean time

Oxford Reference Dictionary

abbr. Greenwich mean time.

Collin's Cobuild Dictionary

GMT is the standard time in Great Britain which is used to calculate the time in the rest of the world. GMT is an abbreviation for 'Greenwich Mean Time'. New Mexico is seven hours behind GMT.