Wiktionary
n. (context set theory English) The Cartesian product of two real lines.
Usage examples of "real plane".
A real plane - not just one of those paper-and-string jobs we use down at the flying club.
Instead of simple chaff and flare decoy bundles, the Vampire ejected small cylindrical gliders that carried wide-spectrum electromagnetic transmitters that simulated the heat and radar signatures of a real plane.
The clearing was already a special place, because his mother had taken him there the year before and shown him a plane, a real plane, back in the trees.
He was very detached when at a scene, but he couldn't be quite so detached when he boarded a real plane.
There was not only the matter of expense, which was as actual a consideration to me on the real plane of my existence as on the camouflaged, two-dimensional one in which I presented myself to him, but my former surroundings had outlived their usefulness.