1. a court, established by the US Constitution, having territorial jurisdiction over a district that may include a whole state or part of it. A district court has original jurisdiction, exclusive of courts of the individual states, over all offenses against laws of the United States, and is a court of general jurisdiction for suits between litigants of different states.
See diversity of citizenship; federal question jurisdiction.
2. an inferior court in several states having limited jurisdiction to try certain minor cases.