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.