all hours

plural noun

: a very late time
stayed up until all hours

Examples of all hours 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.
During the black tenting period, two members of each group must be present during all hours of the day (while others attend classes), but 10 must sleep there every night. Storey Wertheimer, NBC news, 20 Mar. 2026 Doctors and nurses are available all hours of the day. Rachel Royster, Fort Worth Star-Telegram, 10 Mar. 2026 People walk freely in Sayulita all hours of the night and day. Chicago Tribune, 7 Mar. 2026 That was complemented by what was known as a Tony Gwynn SoloHitter contrivance, through which four chords connected to a baseball would reset the ball to its waist-high starting point after each thwacking during all hours of the day. Kansas City Star, 6 Mar. 2026 See All Example Sentences for all hours

Word History

First Known Use

1668, in the meaning defined above

Time Traveler
The first known use of all hours was in 1668

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Cite this Entry

“All hours.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/all%20hours. Accessed 29 Mar. 2026.

Kids Definition

all hours

plural noun
: a very late time
stayed up until all hours
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