A town or city that is the official seat of government in a political entity, such as a state or nation. A city that is the center of a specific activity or industry: the financial capital of the world. Wealth in the form of money or property, used or accumulated in a business by a person, partnership, or corporation. Material wealth used or available for use in the production of more wealth. Human resources considered in terms of their contributions to an economy: "[The] swift unveiling of his . . . plans provoked a flight of human capital\u201d ( George F. Will). Accounting The remaining assets of a business after all liabilities have been deducted; net worth. Capital stock. Capitalists considered as a group or class. An asset or advantage: "profited from political capital accumulated by others\u201d ( Michael Mandelbaum). A capital letter. First and foremost; principal: a decision of capital importance. First-rate; excellent: a capital idea. Relating to or being a seat of government. Extremely serious: a capital blunder. Involving death or calling for the death penalty: a capital offense. Of or relating to financial assets, especially being or related to those financial assets that add to the net worth of a business: made capital improvements at the plant site. Relating to or being a capital letter. Architecture The top part of a pillar or column.