Definitions:

1. (computer science) the amount of information (in bytes) that can be stored on a disk drive noun
   • the capacity of a hard disk drive is usually expressed in megabytes
2. a specified function noun
   • In my capacity of director I have to go to many boring meetings.
3. capability to perform or produce noun
   • Among their gifts is their capacity for true altruism.
4. the amount that can be contained noun
   • the gas tank has a capacity of 12 gallons
5. the maximum production possible noun
   • the plant is working at 80 per cent capacity
6. tolerance for alcohol noun
   • I drank beyond my capacity.

Synonyms:

• capability
• capacitance
• content
• electrical capacity
• mental ability