Definition of fit adjective from the Oxford Advanced American Dictionary

     

    fit

     adjective
    adjective
    NAmE//fɪt//
     
    (fitter, fittest)
     
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    suitable
  1. 1 suitable; of the right quality; with the right qualities or skills fit for somebody/something The food was not fit for human consumption. It was a meal fit for a king (= of very good quality). The kids seem to think I'm only fit for cooking and cleaning! fit to do something Your car isn't fit to be on the road! He's so angry he's in no fit state to see anyone. opposite unfit
  2. healthy
  3. 2 healthy and strong, especially because you do regular physical exercise Top athletes have to be extremely physically fit. fit (to do something) He won't be fit to play in the game on Saturday. She tries to keep fit by jogging every day. opposite unfit
  4. Idioms
    (as) fit as a fiddle(informal)
     
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    in very good physical condition
    fit to be tied(informal)
     
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    very angry or annoyed I was fit to be tied when I saw the mess.
    see/think fit (to do something)(formal)
     
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    to consider it right or acceptable to do something; to decide or choose to do something You must do as you think fit (= but I don't agree with your decision). The newspaper did not see fit to publish my letter (= and I criticize it for that).
    the survival of the fittest
     
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    the principle that only the people or things that are best adapted to their surroundings will continue to exist
See the Oxford Advanced Learner's Dictionary entry: fit