American Heritage® Dictionary of the English Language, Fourth Edition
- n. 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.
- n. The time of day in the time zone that encompasses the segment of the United States that includes the Rocky Mountains.
- n. 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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