Apt"i*tude (#), n. [F. aptitude, LL. aptitudo, fr. L. aptus. See Apt, and cf. Attitude.]
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.
A general fitness or suitableness; adaptation.
That sociable and helpful aptitude which God implanted between man and woman.
Readiness in learning; docility; aptness.
He was a boy of remarkable aptitude.
© Webster 1913.