internal clock
noun
1
: a system in the body that controls when a person needs to sleep, eat, etc.
The long trip upset my internal clock and I had a hard time getting to sleep.
2
: a clock or timing device that is inside a computer
Examples of internal clock in a Sentence
Recent Examples on the Web
Simpson’s limited reps over the last two seasons have shown growth in his internal clock, leading to faster decisions.
—
Kennington Smith Iii, The Athletic, 16 Jan. 2025
Science shows that light (and avoiding light) and, to a lesser extent, melatonin, are the only things that shift your internal clock.
—Tim Neville, Outside Online, 5 Dec. 2024
Our body’s internal clock, or circadian rhythm, regulates our sleep-wake cycles.
—Anita Bhagwandas, Condé Nast Traveler, 29 Oct. 2024
One is the body's circadian rhythm, its internal clock, is disrupted when the days are shorter with less access to the sun, which can cause a mood swing.
—Ashlyn Messier, Fox News, 4 Nov. 2023
See all Example Sentences for internal clock 
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.
Kennington Smith Iii, The Athletic, 16 Jan. 2025
Science shows that light (and avoiding light) and, to a lesser extent, melatonin, are the only things that shift your internal clock.
—Tim Neville, Outside Online, 5 Dec. 2024
Our body’s internal clock, or circadian rhythm, regulates our sleep-wake cycles.
—Anita Bhagwandas, Condé Nast Traveler, 29 Oct. 2024
One is the body's circadian rhythm, its internal clock, is disrupted when the days are shorter with less access to the sun, which can cause a mood swing.
—Ashlyn Messier, Fox News, 4 Nov. 2023
See all Example Sentences for internal clock
Dictionary Entries Near internal clock
Cite this Entry
“Internal clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/internal%20clock. Accessed 23 Jan. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share