D defs.my
Entry 3 senses Webster, 1913

Aptitude

/ăp'-tət-o͞odˌ/ · Apt·i·tude · IPA /ˈæptɪˌtjuːd/
01 n. A natural or acquired disposition or capacity for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitu…
  1. 1.
    A natural or acquired disposition or capacity for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitude to burn.
    “He seems to have had a peculiar aptitude for the management of irregular troops.” Macaulay.
  2. 2.
    A general fitness or suitableness; adaptation.
    “That sociable and helpful aptitude which God implanted between man and woman.” Milton.
  3. 3.
    Readiness in learning; docility; aptness.
    “He was a boy of remarkable aptitude.” Macaulay.