aptness

Apt"ness, n. 1. Fitness; suitableness; appropriateness; as, the aptness of things to their end. The aptness of his quotations. J. R. Green. 2. Disposition of the mind; propensity; as, the aptness of men to follow example. 3. Quickness of apprehension; readiness in learning; docility; as, an aptness to learn is more observable in some children than in others. 4. Proneness; tendency; as, the aptness of iron to rust.

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