treadmill
noun
tread·mill
ˈtred-ˌmil 
1
a
: a device having an endless belt on which an individual walks or runs in place for exercise or physiological testing
b
: a mill worked by an animal treading an endless belt
c
: a mill worked by persons treading on steps on the periphery of a wide wheel having a horizontal axis and used formerly in prison punishment
2
: a wearisome or monotonous routine resembling continued activity on a treadmill
the office treadmill
Examples of treadmill in a Sentence
the treadmill of exhausting family schedules
the treadmill of the morning commute to work
Recent Examples on the Web
For three months, starting in April 2024, Williams received a daily injection of the drug followed by one hour of physical therapy, which included hand exercises and walking with a harness on a flat track or treadmill.
—
Angelica Stabile, FOXNews.com, 3 Oct. 2025
Taking the test involves wearing a heart rate monitor or mask while exercising at maximum effort on a treadmill.
—Alexa Mikhail, Flow Space, 1 Oct. 2025
The base model of the treadmill has also increased by $300, to $3,295; and the Tread+ now costs $6,695, a whopping $700 increase.
—Jordan Valinsky, CNN Money, 1 Oct. 2025
Alternate cardio options include using a stationary bike, a treadmill or a 500-yard swim test as quickly as possible.
—Luis Martinez, ABC News, 1 Oct. 2025
See All Example Sentences for treadmill
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Angelica Stabile, FOXNews.com, 3 Oct. 2025
Taking the test involves wearing a heart rate monitor or mask while exercising at maximum effort on a treadmill.
—Alexa Mikhail, Flow Space, 1 Oct. 2025
The base model of the treadmill has also increased by $300, to $3,295; and the Tread+ now costs $6,695, a whopping $700 increase.
—Jordan Valinsky, CNN Money, 1 Oct. 2025
Alternate cardio options include using a stationary bike, a treadmill or a 500-yard swim test as quickly as possible.
—Luis Martinez, ABC News, 1 Oct. 2025
See All Example Sentences for treadmill
Cite this Entry
“Treadmill.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/treadmill. Accessed 7 Oct. 2025.
Copy CitationKids Definition
treadmill
noun
tread·mill
ˈtred-ˌmil
1
a
: a device moved by persons treading on steps set around the rim of a wide wheel or by animals walking on an endless belt
b
: a device having an endless belt on which an individual walks or runs in place for exercise or medical testing
2
: a tiring or monotonous routine
Medical Definition
treadmill
noun
tread·mill
ˈtred-ˌmil
: a device having an endless belt on which an individual walks or runs in place that is used for exercise and in tests of physiological functions see stress test
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