aptness Meaning, Definition & Usage

  1. noun a disposition to behave in a certain way
    propensity.
    • the aptness of iron to rust
    • the propensity of disease to spread
  2. noun appropriateness for the occasion
    appositeness.
    • the phrase had considerable aptness

WordNet

Apt"ness noun
Definitions
  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.

Webster 1913