around the clock

1 of 2

phrase

variants or less commonly round the clock
Synonyms of around the clocknext
1
: continuously for 24 hours : day and night without cessation
2
: without relaxation and heedless of time

around-the-clock

2 of 2

adjective

: being in effect, continuing, or lasting 24 hours a day : constant
around-the-clock surveillance

Examples of around the clock 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.
Adjective
Data center demand grows Artificial intelligence and cloud computing have intensified the search for reliable, around-the-clock power sources, putting advanced nuclear technologies in the spotlight. Aamir Khollam, Interesting Engineering, 24 June 2026 Her father told the court that she is now confined to a wheelchair and requires around-the-clock medical care. Nikiya Carrero, CBS News, 18 June 2026 Miami-Dade Fire Rescue crews from more than 70 stations across the county are rotating in and out every few hours to maintain around-the-clock operations. Milena Malaver, Miami Herald, 18 June 2026 The siblings — who live with a rare, often fatal genetic condition called Acid Sphingomyelinase Deficiency (ASMD) — are nonverbal, require tube feeding and need around-the-clock care. Tereza Shkurtaj, PEOPLE, 7 June 2026 See All Example Sentences for around the clock

Word History

First Known Use

Phrase

1872, in the meaning defined at sense 1

Adjective

1915, in the meaning defined above

Time Traveler
The first known use of around the clock was in 1872

Browse Nearby Words

See all Nearby Words

Cite this Entry

“Around the clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/around%20the%20clock. Accessed 25 Jun. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster