A plane used for final flattening out of wooden surfaces.

(projective geometry) The plane onto which an object is projected in a parallel or perspective projection

(rare) Fear of planes, especially fear of air-travel on planes.

A concave-soled plane used in making beads.

(graph theory) An embedding of a planar graph in a plane.

(mathematics) A two-dimensional vector field of the phase between two variables

Synonym of spaceplane

(informal) An aircraft to be used as an airborne command post in the event of nuclear war or similar large-scale disaster.

(geometry) A planene about which a geometric figure is symmetric (by reflection)

(computing) Any of the 16 Unicode planes located above Plane 0 (the BMP) and requiring the use of surrogate pairs to encode in UTF-16 (Planes 1 through 16, collectively covering the range of code points from U+10000 through U+10FFFF).