Definition of fitness in English:


Line breaks: fit|ness
Pronunciation: /ˈfɪtnəs


[mass noun]
  • 1The condition of being physically fit and healthy: disease and lack of fitness are closely related [as modifier]: a fitness test
    More example sentences
    • The aim of exercise is to achieve a beneficial level of fitness and health, physically and mentally.
    • The site features a variety of fitness and health tests.
    • Physical fitness and health is the main preoccupation of young women today.
    health, strength, robustness, sturdiness, hardiness, vigour, lustiness, stalwartness; athleticism, toughness, ruggedness, physical fitness, muscularity, tone; good health, good condition, good shape, well-being; state of health, condition, shape, trim, fettle
    informal huskiness
    British informal nick
  • 1.1 Biology An organism’s ability to survive and reproduce in a particular environment: if sharp teeth increase fitness, then genes causing teeth to be sharp will increase in frequency
    More example sentences
    • The differential fitnesses are weighted averages of phenotype fitnesses.
    • We predict the relative fitnesses of hybrid genotypes by calculating the expected numbers of each type of incompatibility.
    • We assume that the relative fitnesses of these genotypes remain constant.

More definitions of fitness

Definition of fitness in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
a powerful whirlpool in the sea