| NOUN | time | Mountain Standard Time, Mountain Time, MST | standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west |
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| Meaning | standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States. | |
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| Synonyms | Mountain Time, MST | |
| Broader | civil time, standard time, local time | The official time in a local region (adjusted for location around the Earth) |