n. 1 flat or level (surface) The lines meet in the same plane 2 aeroplane, aircraft, airliner, jet (plane) I caught the next plane for Marrakesh
adj. 3 flat, even, level, smooth, plain, regular, unbroken, uninterrupted, uniform, horizontal We landed on the plane surface of the glacier
v. 4 glide, skim, skate, skid, slip, slide I swiftly planed along on my sailboard