noun (n)

• capability to perform or produce(noun.attribute)

  Example:
  Among his gifts is his capacity for true altruism.
  Limited runway capacity.
  A great capacity for growth.
  

  Antonym:
  incapacity
  

  source: wordnet30
• the susceptibility of something to a particular treatment(noun.state)

  Synonym:
  capability
  

  source: wordnet30
• the amount that can be contained(noun.quantity)

  Example:
  The gas tank has a capacity of 12 gallons.
  

  Synonym:
  content
  

  source: wordnet30
• the maximum production possible(noun.act)

  Example:
  The plant is working at 80 per cent capacity.
  

  source: wordnet30
• a specified function(noun.act)

  Example:
  He was employed in the capacity of director.
  He should be retained in his present capacity at a higher salary.
  

  source: wordnet30
• (computer science) the amount of information (in bytes) that can be stored on a disk drive(noun.quantity)

  Example:
  The capacity of a hard disk drive is usually expressed in megabytes.
  

  source: wordnet30
• an electrical phenomenon whereby an electric charge is stored(noun.phenomenon)

  Synonym:
  capacitance, electrical capacity
  

  source: wordnet30
• the power to learn or retain knowledge; in law, the ability to understand the facts and significance of your behavior(noun.cognition)

  Synonym:
  mental ability
  

  source: wordnet30
• tolerance for alcohol(noun.attribute)

  Example:
  He had drunk beyond his capacity.
  

  source: wordnet30
• The power of receiving or containing; extent of room or space; passive power; -- used in reference to physical things.(noun)

  source: webster1913