From Longman Dictionary of Contemporary Englishbiplanebi‧plane /ˈbaɪpleɪn/ noun [countable] TTAa type of aircraft with two sets of wings, especially one built in the early 20th century
Examples from the Corpus
biplane• During 1909-1910, Charles Fletcher, Works manager, designed and built a monoplane and a biplane.• I remember a faded photo of my Grandma Nell as a young woman, taking to the air in an open-cockpit biplane.• I remembered the old photo of Grandma Nell holding my five-year-old dad in that open-cockpit biplane.• As I have said, the general structure of these aeroplanes was quite different from the old fabric biplanes.• Breath-taking flight simulation puts you at the joystick from biplane to helicopter.• Mounted atop the upswept rear of the hull was a large biplane tail unit with triple fins and rudders.• The biplane spun around horizontally, perhaps after being blown by a gust of wind. 