- Date: 14th century
- 1 a : the quality or state of being able <ability of the soil to hold water>; especially : physical, mental, or legal power to perform
- b : competence in doing : skill
An aptitude is an innate, acquired or learned or developed component of a competency (the others being knowledge, understanding and attitude) to do a certain kind of work at a certain level. Aptitudes may be physical or mental. The innate nature of aptitude is in contrast to achievement, which represents knowledge or ability that is gained.