What is Chief Financial Officer?

Legal Definition
The chief financial officer (CFO) or chief financial and operating officer (CFOO) is a corporate officer primarily responsible for managing the financial risks of the corporation. This officer is also responsible for financial planning and record-keeping, as well as financial reporting to higher management. In some sectors the CFO is also responsible for analysis of data. The title is equivalent to finance director (FD), a common title in the United Kingdom. The CFO typically reports to the chief executive officer and to the board of directors, and may additionally sit on the board. The CFO supervises the finance unit and is the chief financial spokesperson for the organization. The CFO reports directly to the president/chief executive officer (CEO) and directly assists the chief operating officer (COO) on all strategic and tactical matters as they relate to budget management, cost–benefit analysis, forecasting needs and the securing of new funding.
-- Wikipedia
Legal Definition
Most senior executive responsible directly for the financial planning and execution of the firm. The CFO is accountable for all accounting functions including: (1) control over credit, (2) budgets and financial statements preparation, (3) financing and fund raising coordination, (4) expenditure and liquidity monitoring, (5) investment and taxation issues management, (6) financial performance reporting to the board, and (7) providing to the CEO up-to-date financial data. The CFO is also known as the controller, or comptroller, or finance controller, or chief finance officer.