Not taking exercise; remaining inactive; not put in motion; left unmoved or unstirred.

Chiefly Boxing. Having lost (superfluous) body fat through training; lean, thin. Cf. fine-drawn, adj. 1b.

Firmly encircled or secured by a girdle or a girth. Hence of a person: braced or prepared for physical activity; fit, active; cf. gird, v.1 1b. Also…

In Horse Racing or Athletics: In good ‘form’ or condition; hence colloquial in good health, perfectly well. fit as a fiddle: see fiddle, n. phrases.

U.S. Sport. Of a player on a team: unlikely to play (in a forthcoming match), usually on account of injury. Cf. doubtful, adj. additions e.

in good enough physical condition to play in a match (also in extended use).

that is in good form or condition.