capacity

•  noun

1    [U, singular] the amount that a container, space, building etc can hold:
?capacity of: The fuel tank has a capacity of 12 gallons.The stadium was filled to capacity last night (= completely filled) .
2    [C,U] your ability to do something:
?capacity for: Jan has a real capacity for hard work.
3    [C, usually singular] if you do something in a particular capacity, you do it as part of your job or official position:
?She has travelled a lot in her capacity as a journalist.
4    [U, singular] the amount that a factory or machine can produce:
?The factory is finally working to full capacity.