- an airplane with three supporting wings, one above another: a design used mainly in the early history of the airplane.
Origin of triplane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for triplane
It is a tiny Curtiss triplane, the span of whose wings is only 25 feet.
Here was the principle of the modern biplane and triplane in its infancy.
I mean that when Andy tries to fly in his triplane it will be our turn to laugh.
"Yes, that's where the young master is making his triplane," answered the man.
It was followed by the others, two monoplanes and a triplane.The Girl Aviators' Motor Butterfly
- 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