UT1

 Dictionary entry overview: What does UT1 mean? 

• UT1 (noun)
  The noun UT1 has 1 sense:

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

  Familiarity information: UT1 used as a noun is very rare.

 Dictionary entry details 

• UT1 (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting time and temporal relations

Synonyms:

GMT; Greenwich Mean Time; Greenwich Time; universal time; UT; UT1

Hypernyms ("UT1" is a kind of...):

time (the continuum of experience in which events pass from the future through the present to the past)

Hyponyms (each of the following is a kind of "UT1"):

coordinated universal time; UTC (Greenwich Mean Time updated with leap seconds)