fall asleep
idiom
: to begin sleeping
She fell asleep during the movie.
I woke up and I couldn't fall back asleep.
Examples of fall asleep in a Sentence
Recent Examples on the Web
That internal clock controls your sleep and wake cycles, detecting light as a signal to be awake and darkness as a signal to fall asleep.
—
Kristen Rogers, CNN Money, 27 Oct. 2025
During puberty, your teen’s body naturally wants to fall asleep and wake up later, which can make early school mornings tough.
—Kris Ann Valdez, Parents, 22 Oct. 2025
During this period, people sleep about 20 minutes less, take longer to fall asleep and spend less time in deep, restorative sleep.
—Joanna Fong-Isariyawongse, The Conversation, 21 Oct. 2025
Across all locations—and regardless of access to artificial light—participants slept less and took longer to fall asleep in the nights leading up to a full moon.
—Clarissa Brincat, Popular Science, 16 Oct. 2025
See All Example Sentences for fall asleep
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Kristen Rogers, CNN Money, 27 Oct. 2025
During puberty, your teen’s body naturally wants to fall asleep and wake up later, which can make early school mornings tough.
—Kris Ann Valdez, Parents, 22 Oct. 2025
During this period, people sleep about 20 minutes less, take longer to fall asleep and spend less time in deep, restorative sleep.
—Joanna Fong-Isariyawongse, The Conversation, 21 Oct. 2025
Across all locations—and regardless of access to artificial light—participants slept less and took longer to fall asleep in the nights leading up to a full moon.
—Clarissa Brincat, Popular Science, 16 Oct. 2025
See All Example Sentences for fall asleep
Cite this Entry
“Fall asleep.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fall%20asleep. Accessed 28 Oct. 2025.
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