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Definition of fitness

fitness

/ˈfɪt.nəs/
fit · ness

Adverb:fitly
•
Plural:fitnesses
•
Adjective:fit
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fitness Lexical Profile

fitness Game Scores & Validity

• noun

1

The condition of being physically strong, healthy, and energetic, especially as a result of regular exercise and proper nutrition.

Example

"Regular swimming and cycling helped her maintain a high level of cardiovascular fitness throughout the year."


2

The quality of being suitable, qualified, or appropriate to fulfill a particular role, task, or purpose.

Example

"The regulatory board conducted a thorough review to assess the candidate's fitness to hold public office."


3

An organism's ability to survive and reproduce successfully in a particular environment, passing its genes on to the next generation (in evolutionary biology).

Example

"Mutations that improve camouflage against predators can significantly increase a species' evolutionary fitness."

Synonyms
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Antonyms
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• Rhymes for fitness

Word Origin & Etymology

Coined in the late 16th century from the adjective 'fit' plus the noun-forming suffix '-ness', originally denoting suitability or propriety before acquiring its biological sense in the 19th century and its modern physical health meaning in the 20th century.

Cite this Entry


Wordmom. (2026). Definition of Fitness. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/fitness
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