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Greenwich mean time

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noun, often capitalized M&T Green·wich mean time \ˈgri-nij-, ˈgre-, -nich-\

Simple Definition of Greenwich mean time

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

Source: Merriam-Webster's Learner's Dictionary

Full Definition of Greenwich mean time

  1. :  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

Greenwich, England


First Known Use: 1863


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