Greenwich Mean Time

noun

1. mean solar time on the 0° meridian passing through Greenwich, England, measured from midnight: formerly a standard time in Britain and a basis for calculating times throughout most of the world, it has been replaced by an atomic timescale GMT See universal time

Greenwich Mean Time

/ grĕn′ĭch /

1. See universal time

Usage

The name Greenwich mean time is ambiguous, having been measured from mean midday in astronomy up to 1925, and is not used for scientific purposes. It is generally and incorrectly used in the sense of universal coordinated time , an atomic timescale available since 1972 from broadcast signals, in addition to the earliest sense of universal time , adopted internationally in 1928 as the name for GMT measured from midnight

Example Sentences

UTC — Coordinated Universal Time, also known as Greenwich Mean Time, seven hours before it was planned to go out at 10:19 a.m.

From Seattle Times

The United Kingdom, historically and emotionally tethered to the astronomical standard, enshrined in Greenwich Mean Time, has been reluctant to commit publicly.

From New York Times

That focuses the agenda for schools like Holy Family, a state-funded Catholic school in the London borough of Greenwich, home of the historic Cutty Sark clipper ship and Greenwich Mean Time.

From Seattle Times

“Good evening,” said William as he welcomed the 64 participants, most of whom were on Greenwich mean time.

From Washington Post

Greenwich Mean Time on Dec. 31, when Britain finally leaves the European Union’s single market and customs union, there will be no tariffs or quotas on the movement of goods originating in either place between the United Kingdom and the E.U.

From Washington Post