: a conditioning exercise performed from a supine position by raising the torso to a sitting position and returning to the original position without using the arms or lifting the feet
sat up; sitting up; sits up
1
a
: to rise from a lying to a sitting position
b
: to sit with the back erect
2
: to show interest, alertness, or surprise
sit up and take notice
3
: to stay up after the usual time for going to bed
Examples of sit-up in a Sentence
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Melissa Rudy, FOXNews.com, 17 June 2025
Combining creatine with resistance training, such as push-ups, sit-ups, and crunches, can provide more health benefits.8
Vegetarians may also benefit from taking creatine.
—Health, 17 June 2025
Abby Montanez, Robb Report, 23 June 2025
Dash can’t walk, sit up on his own, or articulate his words.
—Edward Lee, Baltimore Sun, 19 June 2025
See All Example Sentences for sit-up
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Noun
It is often touted as an abdominal exercise, serving as an alternative to traditional sit-ups and crunches.
—Melissa Rudy, FOXNews.com, 17 June 2025
Combining creatine with resistance training, such as push-ups, sit-ups, and crunches, can provide more health benefits.8
Vegetarians may also benefit from taking creatine.
—Health, 17 June 2025
Verb
Two more bedrooms and a pair of skylit bathrooms sit up on the top floor, along with a full laundry setup.
—Abby Montanez, Robb Report, 23 June 2025
Dash can’t walk, sit up on his own, or articulate his words.
—Edward Lee, Baltimore Sun, 19 June 2025
See All Example Sentences for sit-up
Cite this Entry
“Sit-up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sit-up. Accessed 5 Jul. 2025.
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