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English definition of “fitness”

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fitness

noun [U] uk   /ˈfɪt.nəs/ us  

fitness noun [U] (HEALTH)

B1 the condition of being physically strong and healthy: I'm trying to improve my fitness by cycling to work.
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fitness noun [U] (SUITABLE QUALITY)

how suitable someone or something is: His fitness for the new position is not in question. [+ to infinitive] Many people are concerned about her fitness to govern.
(Definition of fitness from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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