What does "greenwich time" mean?

the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

What is a synonym for "greenwich time"?

Common synonyms include: gmt, greenwich, greenwich mean time, slow time, time zone, universal time.

name

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Noun

1
the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere wordnet

Proper Noun