The quality or ability to change and adjust to new conditions or environments.
From Latin 'adaptare' (to fit to), combining 'ad-' (to) and 'aptare' (to fit); the noun form with '-ability' suffix became standard in English by the 1800s.
Adaptability might be the most important trait for survival—creatures with it thrive through environmental changes, and humans used it to colonize every ecosystem on Earth, which is why we're now the most dominant species.
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