Greenwich mean timeplay
Simple Definition of Greenwich mean time
: the time in Greenwich, England, that is used as the basis of standard time throughout the world
Full Definition of Greenwich mean time
: the mean solar time of the meridian of Greenwich used historically as the prime basis of standard time throughout the world —called also Greenwich time — compare coordinated universal time
Origin of greenwich mean time
First Known Use: 1863
Learn More about greenwich mean time
Britannica.com: Encyclopedia article about "Greenwich mean time"
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