1. a small vertical fin attached to the tip of an aircraft wing to reduce drag and improve fuel efficiency
Usage: aviation
2. a small wing or wing-like appendage

Examples

• The new aircraft design features advanced winglets to reduce fuel consumption.
• Airlines are retrofitting older planes with winglets to improve efficiency.
• The winglets on the Boeing 737 curve upward at the wing tips.
• Engineers tested various winglet designs in the wind tunnel.
• The butterfly’s winglets helped it navigate through the narrow space.
• Modern commercial jets commonly use winglets to minimize wingtip vortices.