Noun
1. an aircraft that has a fixed wing and is powered by propellers or jets;
"the flight was delayed due to trouble with the airplane"2. (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"3. a level of existence or development;
"he lived on a worldly plane"4. a power tool for smoothing or shaping wood
5. a carpenter's hand tool with an adjustable blade for smoothing or shaping wood;
"the cabinetmaker used a plane for the finish work"