mountain time

noun

often capitalized M
: the time of the seventh time zone west of Greenwich that includes the Rocky Mountain states of the U.S. see time zone illustration

Examples of mountain time in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
All polls close at 7 p.m. local time, but Texas is located in both the central and mountain time zones. Robert Yoon, San Diego Union-Tribune, 4 Mar. 2024 He is set to depart sometime later in the afternoon for a Friday evening rally in Reno, Nevada, that’s set to begin at 6:30 p.m. mountain time. Nick Coltrain, The Denver Post, 11 Oct. 2024

Word History

First Known Use

1883, in the meaning defined above

Time Traveler
The first known use of mountain time was in 1883

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Cite this Entry

“Mountain time.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mountain%20time. Accessed 14 Mar. 2025.

Kids Definition

mountain time

noun
often capitalized M
: the time of the seventh time zone west of Greenwich that includes the Rocky Mountain states of the U.S.
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