Definitions of capital:

• noun:   the upper part of a column that supports the entablature
• noun:   one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis

  Example: "Printers once kept the type for capitals and for small letters in separate cases"

• noun:   a seat of government
• noun:   wealth in the form of money or property owned by a person or business and human resources of economic value
• noun:   assets available for use in the production of further assets
• noun:   a book written by Karl Marx (1867) describing his economic theories
• adjective:   uppercase

  Example: "Capital A"

• adjective:   of primary important

  Example: "Our capital concern was to avoid defeat"

• adjective:   punishable by death

  Example: "A capital offense"

• adjective:   first-rate

  Example: "A capital fellow"