Thomas Davidson,
Chambers's Twentieth Century Dictionary 1908…
(1908)
“ Plane, plān, n. (geom.) a surface on which, if any two points be taken, the straight line joining them will lie entirely on the surface: (astron.) a surface thought of as bounded by the line round which a heavenly body moves: any flat or level surface: any incline on which coal is lowered by the effect of gravity: any grade of life or of development.—adj. having the character of a plane: pertaining to, lying in, or forming a plane.—v.t. to make plane or smooth.—adj. Plā′nary, relating to a plane: flat.—n. ”
