Greenwich mean time /ˈgrɪnɪʤ-/ /ˈgrɛnɪtʃ-/ noun /ˈgrɪnɪʤ-/ /ˈgrɛnɪtʃ-/
noun
Learner's definition of GREENWICH MEAN TIME
[singular]
: the time in Greenwich, England, that is used as the basis of standard time throughout the world格林尼治平时 — called also (US) Greenwich time