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biplane

American  
[bahy-pleyn] / ˈbaɪˌpleɪn /

noun

  1. an airplane with two sets of wings, one above and usually slightly forward of the other.

biplane British  
/ ˈbaɪˌpleɪn /

noun

  1. a type of aeroplane having two sets of wings, one above the other Compare monoplane

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of biplane

First recorded in 1870–75; bi- 1 + (air)plane

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.