a type of aeroplane having two sets of wings, one above the other
Compare monoplane
WordReference Random House Learner's Dictionary of American English © 2025
bi•plane /ˈbaɪˌpleɪn/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- Aeronauticsan airplane with two sets of wings, one above the other:The old biplanes performed for the airshow.
bi•plane
(bī′plān′),USA pronunciation n.
- Aeronauticsan airplane with two sets of wings, one above and usually slightly forward of the other.
- bi-1 + (air)plane 1870–75
Collins Concise English Dictionary © HarperCollins Publishers::
'biplane' also found in these entries (note: many are not synonyms or translations):