a the degree of adaptation of an organism to its environment, determined by its genetic constitution
b the ability of an organism to produce viable offspring capable of surviving to the next generation
Warrant of Fitness
n (N.Z) a six-monthly certificate required for motor vehicles certifying mechanical soundness
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"