1. small vertical fins attached to the tips of aircraft wings to reduce drag and improve fuel efficiency
Usage: aviation
2. small wings or wing-like appendages

Examples

• The new Boeing aircraft features advanced winglets that reduce fuel consumption by five percent.
• Airlines are retrofitting older planes with winglets to improve their environmental performance.
• The winglets on the jet curved upward at sharp angles from each wingtip.
• Modern commercial aircraft almost universally include winglets in their design.
• The butterfly’s delicate winglets shimmered in the sunlight.
• Engineers tested various winglet designs in the wind tunnel.
• The airline saved millions in fuel costs after installing winglets on their fleet.