FASB statements of financial accounting concepts definition
This series of output by the Financial Accounting Standards Board is part of the board's conceptual framework project. The original goal in the 1970's was to articulate the definitions, practices, and rules that were used in accounting. It was hoped that from this structured compilation new rules will flow more easily and logically. However, this series of statements is not viewed as part of the generally accepted accounting principles.
Seven concepts statements have been issued and can be read at www.fasb.org under the tab entitled Standards.