Plain English Meaning
The exact spot on the runway where you plan to land the airplane. It is the target you fly toward on final approach.
Full Definition
The point on the runway where the airplane's main wheels are intended to first make contact with the surface during landing. In the traffic pattern context, the touchdown point is the spot the pilot aims for during the final approach and uses as the visual reference for judging glidepath, descent rate, and roundout timing.
Context Anchor
You use this term when planning or evaluating a landing, especially while flying the traffic pattern and final approach.