1. Noun
Fitness; suitableness; appropriateness; as, the aptness of things to their end.
2. Noun
Disposition of the mind; propensity; as, the aptness of men to follow example.
3. Noun
Quickness of apprehension; readiness in learning; docility; as, an aptness to learn is more observable in some children than in others.
4. Noun
Proneness; tendency; as, the aptness of iron to rust.
5. Noun
appropriateness for the occasion; "the phrase had considerable aptness"
Vocabulary classified under Environmental science
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