1
: the quality or state of being fit
2
: the capacity of an organism to survive and transmit its genotype to reproductive offspring as compared to competing organisms
also
: the contribution of an allele or genotype to the gene pool of subsequent generations as compared to that of other alleles or genotypes
Examples of fitness in a Sentence
a gymnastics program promoting fitness and agility in school-aged children
I have to question the fitness of wearing a bright red dress to a funeral.
Recent Examples on the Web
Schumer wore a short Miu Miu button-down shirt dress and black heels — and the comments had kind words for her fitness progress.
—
Madison E. Goldberg, PEOPLE, 31 Oct. 2025
From the bands that grocers use to keep broccoli stalks together, to resistance bands which are used for fitness and physical therapy, colorful rubber bands for crafting, oversized bands for industrial use and specialty bands which can be used for do-it-yourself projects such as tie-dye.
—Sydney Sasser, Arkansas Online, 30 Oct. 2025
As a result, regular planking can help with everything from everyday activities to sports performance, said Or Artzi, CPT, a lead group fitness instructor at Equinox and creator of the fitness platform Orriors.
—Danielle Zickl, Health, 30 Oct. 2025
His results showed that as long as the same total amount of exercise per week is performed at the same exercise intensity, frequency can vary from two to four days per week and produce similar results for aerobic fitness.
—Bryant Stamford, Louisville Courier Journal, 30 Oct. 2025
See All Example Sentences for fitness
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.
Madison E. Goldberg, PEOPLE, 31 Oct. 2025
From the bands that grocers use to keep broccoli stalks together, to resistance bands which are used for fitness and physical therapy, colorful rubber bands for crafting, oversized bands for industrial use and specialty bands which can be used for do-it-yourself projects such as tie-dye.
—Sydney Sasser, Arkansas Online, 30 Oct. 2025
As a result, regular planking can help with everything from everyday activities to sports performance, said Or Artzi, CPT, a lead group fitness instructor at Equinox and creator of the fitness platform Orriors.
—Danielle Zickl, Health, 30 Oct. 2025
His results showed that as long as the same total amount of exercise per week is performed at the same exercise intensity, frequency can vary from two to four days per week and produce similar results for aerobic fitness.
—Bryant Stamford, Louisville Courier Journal, 30 Oct. 2025
See All Example Sentences for fitness
Cite this Entry
“Fitness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fitness. Accessed 4 Nov. 2025.
Copy CitationMedical Definition
fitness
noun
fit·ness
ˈfit-nəs 
: the capacity of an organism to survive and transmit its genotype to reproductively fertile offspring as compared to competing organisms
also
: the contribution of an allele or genotype to the gene pool of subsequent generations as compared to that of other alleles or genotypes
Love words? Need even more definitions?
Merriam-Webster unabridged
Share