Definition
The actual flight path of an aircraft over the surface of the earth.
Plain English
Track is the line your aircraft actually traces across the ground as it flies, regardless of which way the nose is pointed.
Context Anchor
You will see this term in navigation, radar, and wind-correction discussions, especially when the airplane is pointed one way but moving over the ground a slightly different way.
Derivation
From Old French 'trac' meaning a trail or footprint left behind. The aviation meaning preserves this idea — the path you have actually traced over the ground, like footprints showing where you really went.
Why Pilots Care
Knowing the actual track versus the heading allows pilots to apply wind corrections and stay on the intended route.
Analogy
Think of walking across a windy field. Your body may face slightly into the wind, but your footprints show the path you actually took. Those footprints are like your track.
Intuition Check
Do not assume track means the same thing as the direction the nose is pointed. Track is where the aircraft is actually going over the ground; the nose may point somewhere else because of wind.
Example Sentence 1
With a strong crosswind, the pilot adjusted the heading to maintain the desired track to the airport.
Example Sentence 2
The GPS showed the aircraft drifting left of the planned track until the pilot applied drift correction.