healthy and strong, especially because you do regular physical exercise:
Top athletes have to be very fit; (British English) He won’t be fit to play in the match on Saturday; She tries to keep fit by jogging every day; (British English) He’s had a bad cold and isn’t fit enough for work yet; I feel really fighting fit (= very healthy and full of energy); The government aims to make British industry leaner and fitter (— employing fewer people and with lower costs).
— see also KEEP-FIT
Opposite - UNFIT
SYNONYMS well all right • OK • fine • healthy • strong • fit
These words all describe somebody who is not ill and is in good health.
well [not usually before noun] (rather informal) in good health: I’m not feeling very well; Is he well enough to travel? NOTE. Well is used especially to talk about your own health, to ask somebody about their health or to make a comment on it. all right [not before noun] (rather informal) not feeling ill; not injured: Are you feeling all right? OK [not before noun] (informal) not feeling ill; not injured : She says she’s OK now, and will be back at work tomorrow.
ALL RIGHT OR OK? These words are slightly less positive than the other words in this group. They are both used in spoken English to talk about not actually being ill or injured, rather than being positively in good health. Both are rather informal but OK is slightly more informal than all right.
fine [not before noun] (not used in negative statements) (rather informal) completely well: ‘How are you?’ ‘Fine, thanks.’ NOTE. Fine is used especially to talk about your health, especially when somebody asks you how you are. It is also used to talk about somebody’s health when you are talking to somebody else. Unlike well it is not often used to ask somebody about their health or make a comment on it. healthy in good health and not likely to become ill: Keep healthy by exercising regularly. strong in good health and not suffering from an illness: After a few weeks she was feeling stronger. NOTE. Strong is often used to talk about becoming healthy again after an illness. fit (especially British English) in good physical health, especially because you take regular physical exercise: I go swimming every day in order to keep fit.
PATTERNS AND COLLOCATIONS • all right/OK/fit for something • all right/OK/fit to do something • to be/seem/look/feel well/all right/OK/fine/healthy/ strong/fit • to keep (somebody) well/healthy/strong/fit • a healthy/fit man/woman • perfectly/completely well/all right/OK/fine/healthy/ strong/fit • very/extremely/quite/fairly well/healthy/strong/fit • physically well/fine/healthy/strong/fit • fit and well