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Noun: fitness  fit-nus
  1. Good physical condition; being in shape or in condition
    - physical fitness
  2. The quality of being suitable
    "they had to prove their fitness for the position";
    - fittingness
  3. The quality of being qualified

Type of: competence, competency, condition, shape, suitability, suitableness

Antonym: softness, unfitness

Encyclopedia: Fitness