an airplane with three supporting wings, one above another: a design used mainly in the early history of the airplane.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use triplane in a sentence
The night bomber is very often a huge triplane, for the extra wing surface gives greater lifting power.
First of all the pioneer designer had to choose between the monoplane, the biplane and the triplane.
The huge night bombing machine of the present time is almost always of the triplane type.
Until clever engineers came to the rescue with an improved aircraft motor, the triplane was very much in disfavor.
Their three bombers, including a smaller triplane and a biplane, headed the list of their fellows at the front.
British Dictionary definitions for triplane
an aeroplane having three wings arranged one above the other
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