Plain English Meaning
The temperature of the air around the aircraft right now, shown on a gauge in the cockpit.
Full Definition
The temperature of the ambient air surrounding the aircraft, measured by a probe mounted on the airframe and displayed in the cockpit, typically in degrees Celsius. It is used as an input for performance calculations, density altitude, true airspeed computation, and icing assessment.
Context Anchor
Seen on cockpit temperature displays, performance charts, weather discussions, and instrument-flying references that use temperature as an input.