Ability

• the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment
• possession of the qualities (especially mental qualities) required to do something or get something done; "danger heightened his powers of discrimination"
• The quality or state of being able; power to perform, whether physical, moral, intellectual, conventional, or legal; capacity; skill or competence in doing; sufficiency of strength, skill, resources, etc.; -- in the plural, faculty, talent; Considerable proficiency; natural capability
• A characteristic that is indicative of competence in a field. (See also aptitude.)
• A present competence to perform an observable behavior or a behavior that results in an observable product.
• the power to perform or accomplish something.
• the level of successful performance of the objects of measurement on the variable.
• The present capacity to perform a physical or mental function.