Do not confuse ability with capability and capacity.
You often use ability to say that someone can do something well.
A person's capability is the amount of work they can do and how well they can do it.
If someone has a particular capacity, a capacity for something, or a capacity to do something, they have the qualities required to do it. Capacity is a more formal word than ability.
Noun | 1. | capability - the quality of being capable -- physically or intellectually or legally; "he worked to the limits of his capability" associability, associableness - the capability of being easily associated or joined or connected in thought ability - the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment defensibility - capability of being defended; "they built their castles with an eye to their defensibility"; "client complaints create a felt need for the defensibility of individual actions" executability - capability of being executed; "the job is executable for two million dollars"; "this contract is not executable" capacity - capability to perform or produce; "among his gifts is his capacity for true altruism"; "limited runway capacity"; "a great capacity for growth" military capability, military posture, military strength, strength, posture - capability in terms of personnel and materiel that affect the capacity to fight a war; "we faced an army of great strength"; "politicians have neglected our military posture" operating capability, performance capability - the capability of a technological system to perform as intended overkill - the capability to obliterate a target with more weapons (especially nuclear weapons) than are required incapability, incapableness - the quality of not being capable -- physically or intellectually or legally |
2. | capability - the susceptibility of something to a particular treatment; "the capability of a metal to be fused" resistance - the capacity of an organism to defend itself against harmful environmental agents; "these trees are widely planted because of their resistance to salt and smog" susceptibility, susceptibleness - the state of being susceptible; easily affected activity - (chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity" | |
3. | capability - an aptitude that may be developed aptitude - inherent ability perfectibility - the capability of becoming perfect; "he believes in the ultimate perfectibility of man" imperfectibility - the capability of becoming imperfect incapability, incapableness - lack of potential for development |