APT'ITUDE, noun [of aptus, apt.] 1. A natural or acquired disposition for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitude to burn; men acquire an aptitude to particular vices. 2. Fitness; suitableness. 3. Aptness; readiness in learning; docility.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI