›activities relating to keeping healthy and strong, especially through exercise: The increase of interest in health and fitness means that most hotels now have gyms and pools.the fitness industry/sectora fitness centre/clubfitness trainers/instructors
›the quality of being suitable for a particular job or of being good enough for something: sb's fitness for sthThey have to pass exams to test their fitness for the job.sb's fitness to do sthDoctors will remain on the medical register only if they can demonstrate their fitness to continue practising.