Definition of multiplane in US English:

multiplane

adjective

  • 1Of a kite: having more than one flat surface (rare). Of an aircraft or its design: having two or more wings placed one above another. Now historical.

  • 2Film. Designating or relating to a technique in which several images in distinct planes or layers are used to give an enhanced impression of perspective, used especially for animated films.

  • 3Generally. Involving or occupying several distinct planes, layers, or levels (not necessarily horizontal).

noun

  • An aircraft having two or more sets of wings placed one above another (as in a biplane or triplane). Now historical.

Origin

Late 19th century; earliest use found in The Century Illustrated Monthly Magazine. From multi- + plane. With use as noun compare earlier aeroplane, biplane, monoplane, plane, and also French multiplan, noun.

Pronunciation

multiplane

/ˈmʌltɪpleɪn/