Plain English Meaning
A regular wheeled airplane that operates from runways or other solid surfaces on the ground.
Full Definition
An airplane designed to take off from and land on solid ground using wheels as its landing gear, as distinguished from a seaplane (which operates from water) or a skiplane (which operates from snow or ice).
Context Anchor
Seen in aircraft class descriptions, light-sport aircraft discussions, and pilot privileges that specify what kind of airplane a pilot may fly.
Derivation
A simple compound of 'land' and 'plane.' The word exists because once seaplanes and skiplanes appeared, aviation needed a term to specifically mean 'the kind that operates from land' rather than just 'airplane.'
Why Pilots Care
Pilot certificates, ratings, and aircraft category endorsements distinguish between landplanes, seaplanes, and skiplanes. A pilot rated for a landplane is not automatically authorized to fly the seaplane or skiplane version of the same aircraft.
Intuition Check
A landplane is not simply any airplane that is currently on the ground. It means an airplane built and equipped to operate from land surfaces.
Example Sentence 1
The student earned her sport pilot certificate in a landplane and later added a seaplane rating.
Example Sentence 2
Many light-sport aircraft are available in both landplane and seaplane configurations.