Mountain Standard TimeMountain Standard Time
a standard time used in the zone which includes the Rocky Mountain region of the U.S. corresponding to the mean solar time of the 105th meridian west of Greenwich, England: it is seven hours behind Greenwich time
Mountain Standard Time
Standard time in the seventh time zone west of Greenwich, England, reckoned at 105° west and used in the Rocky Mountain states of the United States. Also called Mountain Time .
- The time of day in the time zone that encompasses the segment of the United States that includes the Rocky Mountains.