Greenwich mean time

noun, often capitalized M&T

Green·wich mean time | \ ˈgri-nij-

, ˈgre-, -nich-\

Definition of Greenwich mean time

: the mean 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

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More Definitions for Greenwich mean time

Greenwich mean time

noun

: the time in Greenwich, England, that is used as the basis of standard time throughout the world