1. an airplane with two main wings, one above the other

Examples

• The Wright brothers flew the first successful biplane in 1903.
• Old biplanes were common in early aviation and World War I.
• The vintage biplane performed loops and rolls at the air show.
• Many crop dusters are biplanes because of their stability at low speeds.
• The museum displayed a restored biplane from the 1920s.
• Learning to fly a biplane requires different skills than modern aircraft.