Coordinated Universal Time
noun
: the international standard of time that is kept by atomic clocks around the world
—abbreviation UTC
compare greenwich mean time, universal time
Examples of Coordinated Universal Time in a Sentence
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Under the Daylight Act, the time zone offsets from Coordinated Universal Time would be changed from hour increments to half-hour increments.
—
Jordan Green, Memphis Commercial Appeal, 7 Mar. 2026
It was later expanded to encompass nine time zones, all defined by their difference from the global Coordinated Universal Time (UTC).
—Jeanine Santucci, USA Today, 6 Mar. 2026
Here's the exact timing of the eclipse in Coordinated Universal Time (UTC).
—Stefanie Waldek, Condé Nast Traveler, 2 Mar. 2026
And while the shower will go on for several days, the peak is predicted to come on October 8, beginning at around 19:00 UTC (Coordinated Universal Time), or 15:00 ET.
—Rachael O'Connor, MSNBC Newsweek, 6 Oct. 2025
In Coordinated Universal Time, or UTC, the eclipse will occur throughout the day on Sept. 7.
—Marina Johnson, Louisville Courier Journal, 5 Sep. 2025
The clocks are also capable of measuring in billionths of a second, or nanoseconds, which are synchronized globally to Coordinated Universal Time (UTC).
—James Powel, Freep.com, 5 Aug. 2025
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Jordan Green, Memphis Commercial Appeal, 7 Mar. 2026
It was later expanded to encompass nine time zones, all defined by their difference from the global Coordinated Universal Time (UTC).
—Jeanine Santucci, USA Today, 6 Mar. 2026
Here's the exact timing of the eclipse in Coordinated Universal Time (UTC).
—Stefanie Waldek, Condé Nast Traveler, 2 Mar. 2026
And while the shower will go on for several days, the peak is predicted to come on October 8, beginning at around 19:00 UTC (Coordinated Universal Time), or 15:00 ET.
—Rachael O'Connor, MSNBC Newsweek, 6 Oct. 2025
In Coordinated Universal Time, or UTC, the eclipse will occur throughout the day on Sept. 7.
—Marina Johnson, Louisville Courier Journal, 5 Sep. 2025
The clocks are also capable of measuring in billionths of a second, or nanoseconds, which are synchronized globally to Coordinated Universal Time (UTC).
—James Powel, Freep.com, 5 Aug. 2025
Cite this Entry
“Coordinated Universal Time.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Coordinated%20Universal%20Time. Accessed 25 Apr. 2026.
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