Plain English Meaning
A small, basic two-seat airplane that meets a specific set of FAA size and performance limits. Because it stays within those limits, it can be flown with the simplest pilot certificate available.
Full Definition
A category of small, simple airplane defined by the FAA with strict limits on weight, speed, seating, and configuration. A light-sport airplane has a maximum gross takeoff weight of 1,320 pounds (1,430 pounds for seaplanes), a maximum stall speed of 45 knots in landing configuration, a maximum cruise speed of 120 knots, no more than two seats, a single reciprocating engine, fixed landing gear (or repositionable for seaplanes), and a fixed or ground-adjustable propeller. It can be flown by a pilot holding at least a Sport Pilot certificate.
Context Anchor
Seen in training material about sport pilot flying and in discussions of which airplanes a sport pilot may operate.
Derivation
The name describes the category directly: 'light' refers to the strict weight limit, and 'sport' reflects that this class was created for recreational flying rather than commercial or heavy-duty use.
Why Pilots Care
It enables pilots to fly with a Sport Pilot certificate that requires fewer training hours and no FAA medical certificate, lowering barriers to recreational flying.
Intuition Check
Do not read light-sport airplane as simply “a lightweight airplane used for fun.” In FAA use, it means an airplane that fits a specific set of legal design and performance limits.
Example Sentence 1
She earned her Sport Pilot certificate so she could fly the club's light-sport airplane on weekend trips.
Example Sentence 2
Many pilots choose a light-sport airplane because it keeps operating costs low for weekend local flights.