1. An aircraft flight operating under conditions which allow navigation by visual reference to the earth's surface at a safe altitude and with sufficient horizontal visibility.
2. An aircraft flight in which the pilot uses direct vision instead of using instruments to determine attitude and position.

This takes place under conditions that allow navigation by visual reference to the earth's surface at a safe altitude and with sufficient horizontal visibility, while operating under visual flight rules.

Instruments are normally used in visual flight to determine the altitude, airspeed, compass direction, etc.

A set of regulations set down by the U.S. Civil Aeronautics Board, operating within Civil Air Regulations, to govern the operational control of aircraft during visual flight, including minimum visibility standards relating to cloud separation, haze, precipitation, etc. which are more stringent than those for instrument flight.

The abbreviation VFR is seldom used to indicate the regulations themselves; however, it is often utilized to describe the weather and flight conditions to which such rules are applicable.