What is Net Worth?

Legal Definition
Net worth (sometimes called net or wealth) is the total assets minus total outside liabilities of an individual or a company. Net worth is used when talking about the value of a company or in personal finance for an individual's net economic position.

Put another way, net worth is any asset owned minus any debt owed. Net worth can be a negative number if one's debt owed is greater than the value of the assets owned.
-- Wikipedia
Legal Definition
Firm's value to its owners, typically stockholders or shareholders. Value is usually shown on the firm's balance sheet. Issued share capital plus retained earnings plus capital gains equals net worth. Also known as net value.