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
Your body type, fitness level, and genetics all play a role.
—
Sherri Gordon, Health, 18 Mar. 2025
Most rowing machines can be adjusted to provide an appropriate challenge to people of all fitness levels.
—Tim Petrie, Dpt, Verywell Health, 18 Mar. 2025
Explore hobbies or passions outside of fitness to rediscover balance.
—Bryan Robinson, Forbes, 17 Mar. 2025
While concerns about Biden's fitness for office forced him to call off his reelection campaign, the right has taken that to an extreme.
—Rachel Treisman, NPR, 17 Mar. 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.
Sherri Gordon, Health, 18 Mar. 2025
Most rowing machines can be adjusted to provide an appropriate challenge to people of all fitness levels.
—Tim Petrie, Dpt, Verywell Health, 18 Mar. 2025
Explore hobbies or passions outside of fitness to rediscover balance.
—Bryan Robinson, Forbes, 17 Mar. 2025
While concerns about Biden's fitness for office forced him to call off his reelection campaign, the right has taken that to an extreme.
—Rachel Treisman, NPR, 17 Mar. 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 24 Mar. 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