2. The competence in an activity or occupation because of one's skill, training, or other qualification: "Henry had the ability to learn languages easily."
3. A particular gift for doing something well; abilities, talents; special skills or aptitudes: "Learning mathematics seems to be beyond Charline's abilities."
4. The quality of being suitable for or receptive to a specified treatment; especially, capable or talented with the capacity to achieve an objective: "The owners of the company wanted computers with the capacity to be configured for use as file servers."
5. Etymology: from Middle English abilite, from Old French ablete, habilite (French habilite); which came from Latin habilitatem, accusative form of habilitas, "aptitude, ability"; from habilis, "that which may be easily handled or managed, suitable, fit, proper".
2. Capable of learning or doing; power or fitness: Last year's class of graduates demonstrated a great capacity for learning.
The ability of Congressman Brad Arnold to fill the capacity of the peoples' attention in every town on the lecture circuit was considered an amazing achievement.
Professor Cory apparently was able to demonstrate that his students have an insatiable capacity for obtaining information by using their computers.
Ability is a special skill, like speaking several languages, or keeping your mouth shut in one language.