Greenwich Mean Time
time at Greenwich (London) used as the basis for calculating standard times around the world | ||||
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Greenwich Mean Time Definition from Computer & Internet Dictionaries & Glossaries
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Greenwich Mean Time
<time, standard> (GMT) The local time on the Greenwich meridian, based on the hypothetical mean sun (which averages out the effects of the Earth's elliptical orbit and its tilted axis). GMT is the basis of the civil time for the UK.
In 1925 the reference point was changed from noon to midnight and it was recommended that the term "Universal Time" should be used for the new GMT.
Authorities disagreed on whether GMT equates with UT0 or UT1, however the differences between the two are of the order of thousandths of a second. GMT is no longer used for scientific purposes.
(2001-08-02)
<time, standard> (GMT) The local time on the Greenwich meridian, based on the hypothetical mean sun (which averages out the effects of the Earth's elliptical orbit and its tilted axis). GMT is the basis of the civil time for the UK.
In 1925 the reference point was changed from noon to midnight and it was recommended that the term "Universal Time" should be used for the new GMT.
Authorities disagreed on whether GMT equates with UT0 or UT1, however the differences between the two are of the order of thousandths of a second. GMT is no longer used for scientific purposes.
(2001-08-02)
Greenwich Mean Time Definition from Government Dictionaries & Glossaries
| DOD Dictionary of Military Terms |
Greenwich Mean Time
See Universal Time. Also called GMT.
See Universal Time. Also called GMT.
Greenwich Mean Time Definition from Language, Idioms & Slang Dictionaries & Glossaries
| WordNet 2.0 |
Greenwich Mean Time
Noun
1. the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
(synonym) Greenwich Time, GMT, universal time, UT, UT1
(hypernym) time
(hyponym) coordinated universal time, UTC
Noun
1. the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
(synonym) Greenwich Time, GMT, universal time, UT, UT1
(hypernym) time
(hyponym) coordinated universal time, UTC
| hEnglish - advanced version |
greenwich mean time
greenwich mean time
n : the local time at the 0 meridian passing through greenwich, england; it is the same everywhere [syn: greenwich mean time , greenwich time, gmt, universal time, ut, ut1]
greenwich mean time
n : the local time at the 0 meridian passing through greenwich, england; it is the same everywhere [syn: greenwich mean time , greenwich time, gmt, universal time, ut, ut1]
Greenwich Mean Time Definition from Science & Technology Dictionaries & Glossaries
| WEATHER&METEOROLOGY |
GREENWICH MEAN TIME (GMT)
The name of the twenty-four hour time scale which is used throughout the scientific and military communities. Standard Time begins at Greenwich, England, home of the Royal Observatory which first utilized this method of world time. This is also the Prime Meridian of Longitude. The globe is divided into twenty-four (24) time zones of 15 degrees of arc, or one hour in time apart. To the east of this meridian, time zones are number from 1 to 12 and prefixed with a minus (-), indicting the number of hours to be subtracted to obtain Greenwich Time (GMT). To the west, the time zones are also numbered 1 through 12, but are prefixed with a plus (+), indicating the number of hours to be added to obtain GMT. Related terms: Universal Time Coordinate (UTC) and Zulu (Z)
The name of the twenty-four hour time scale which is used throughout the scientific and military communities. Standard Time begins at Greenwich, England, home of the Royal Observatory which first utilized this method of world time. This is also the Prime Meridian of Longitude. The globe is divided into twenty-four (24) time zones of 15 degrees of arc, or one hour in time apart. To the east of this meridian, time zones are number from 1 to 12 and prefixed with a minus (-), indicting the number of hours to be subtracted to obtain Greenwich Time (GMT). To the west, the time zones are also numbered 1 through 12, but are prefixed with a plus (+), indicating the number of hours to be added to obtain GMT. Related terms: Universal Time Coordinate (UTC) and Zulu (Z)
| Telecommunication Standard Terms |
Greenwich Mean Time (GMT)
Mean solar time at the meridian of Greenwich, England, formerly used as a basis for standard time throughout the world. (188 ) Obsolete term. Synonym Greenwich Civil Time. See Coordinated Universal Time.
Mean solar time at the meridian of Greenwich, England, formerly used as a basis for standard time throughout the world. (188 ) Obsolete term. Synonym Greenwich Civil Time. See Coordinated Universal Time.
| Abbreviation Airbus A340 |
GMT
Greenwich Mean Time
Greenwich Mean Time
| Physical Geography Terms and Meanings |
Greenwich Mean Time (GMT)
Former standard world time as measured at Greenwich, England (location of the Prime Meridian). Replace in 1928 with Universal Time (UT).
Former standard world time as measured at Greenwich, England (location of the Prime Meridian). Replace in 1928 with Universal Time (UT).
Greenwich Mean Time Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Greenwich Mean Time
Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal Observatory, Greenwich in England. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time scale which only approximates GMT in the old sense. It is also used to refer to Universal Time (UT), which is the astronomical concept that directly replaced the original GMT.
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