(n)airplane, aeroplane, planean aircraft that has a fixed wing and is powered by propellers or jets“the flight was delayed due to trouble with the airplane”
(n)plane, sheet(mathematics) an unbounded two-dimensional shape“we will refer to the plane of the graph as the X-Y plane”, “any line joining two points on a plane lies wholly on that plane”
(n)plane, carpenter's plane, woodworking planea carpenter's hand tool with an adjustable blade for smoothing or shaping wood“the cabinetmaker used a plane for the finish work”
(s)flat, level, planehaving a surface without slope, tilt in which no part is higher or lower than another“a flat desk”, “acres of level farmland”, “a plane surface”, “skirts sewn with fine flat seams”