plural of fitness centre

(New Zealand) A certification that a motor vehicle is roadworthy, based on an annual or semiannual inspection. / (New Zealand, by extension) An assurance that something is in good working order.

plural of warrant of fitness

(simile) Very fit; in good shape.

Extremely; lavishly. / In a manner full of anger or malevolence.

Very well groomed; / Extremely angry. / Used other than figuratively or idiomatically: see fit, kill.

(informal, chiefly UK) Wholeheartedly

(UK) Sufficiently fit to participate in fighting; hence, in top physical condition.

plural of fitness club

(evolutionary theory) A diagram used to visualize the relationship between genotypes and reproductive success, with peaks representing high fitness and valleys representing low fitness.