From Longman Dictionary of Contemporary Englishmonoplanemon‧o‧plane /ˈmɒnəʊpleɪn $ ˈmɑːnoʊ-/ noun [countable] TTAa plane with only one wing on each side → biplane
Examples from the Corpus
monoplane• During 1909-1910, Charles Fletcher, Works manager, designed and built a monoplane and a biplane.• Leon Levavasseur's Antoinette monoplane of 1910.• The huge monoplane had to achieve a speed of fifty miles an hour to become airborne.• He designed a small single-seat monoplane which could be used for little but fun flying and possibly racing.• The monoplane wing comprised a lengthy parallel-chord centre section, with tapered outer panels incorporating Frise-type ailerons.• Of all-metal construction, the Firefly F.I was a cantilever low-wing monoplane with an alclad-covered monocoque fuselage. 