Common Law

The legal system that originated in England and is now in use in the United States that relies on the articulation of legal principles in a historical succession of judicial decisions. Common law principles can be changed by legislation.

Source: U.S. Courts

Law that derives its force and authority from precedent, custom and usage rather than from statutes, particularly with reference to the laws of England and the United States.

Source: U.S. Maritime Administration.

A body of law developed from judicial decisions or custom rather than legislative enactments.

Source: Office of Child Support Enforcement.

Laws that come from court decisions and not from statutes ("codes") or constitutions.

Source: California Courts.