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
This trending workout burns fat without intense exercise, according to fitness experts.
—
Staff, FOXNews.com, 29 May 2025
Korean defender Kim, in particular, struggled with fitness issues that directly impacted his form.
—Manuel Veth, Forbes.com, 29 May 2025
Additionally, 74 percent of all respondents and 58 percent of Democrats believed Biden did not possess the mental and cognitive fitness necessary to effectively serve as president.
—Martha McHardy, MSNBC Newsweek, 28 May 2025
No experience is necessary and all fitness levels are welcome.
—Joe Rassel, The Orlando Sentinel, 28 May 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.
Staff, FOXNews.com, 29 May 2025
Korean defender Kim, in particular, struggled with fitness issues that directly impacted his form.
—Manuel Veth, Forbes.com, 29 May 2025
Additionally, 74 percent of all respondents and 58 percent of Democrats believed Biden did not possess the mental and cognitive fitness necessary to effectively serve as president.
—Martha McHardy, MSNBC Newsweek, 28 May 2025
No experience is necessary and all fitness levels are welcome.
—Joe Rassel, The Orlando Sentinel, 28 May 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 Jun. 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