Definition of "biplane" in English

adjective

1. Composed of, or relating to, two planes (flat surfaces extending infinitely in all directions).

   • biplane angiography

2. (aviation) Having, or consisting of, two superposed planes, aerocurves, etc.

   • a biplane rudder

noun

1. (aviation) An airplane that has two main wings, one above the other and supported by struts.

verb

1. (intransitive, rare) To fly in a biplane.