plane

:  any of a genus (Platanus of the family Platanaceae, the plane-tree family) of chiefly deciduous trees with large palmately lobed leaves, flowers in globose heads, and usually scaling bark —called also buttonwood, plane tree, sycamore

:  a tool for smoothing or shaping a wood surface

1a :  a surface in which if any two points are chosen a straight line joining them lies wholly in that surfaceb :  a flat or level surface

2 :  a level of existence, consciousness, or development on the intellectual plane

3a :  one of the main supporting surfaces of an airplaneb [by shortening] :  airplane

1 :  having no elevations or depressions :  flat

2a :  of, relating to, or dealing with geometric planesb :  lying in a plane a plane curve

1a :  to fly while keeping the wings motionlessb :  to skim across the surface of the water

2 :  to travel by airplane

1 :  airplane

2 :  a surface in which if any two points are chosen a straight line joining them lies completely in that surface

3 :  a level of thought, existence, or development The two stories are not on the same plane.

4 :  a level or flat surface a horizontal plane

:  ¹horizontal, flat a plane surface

:  a tool that smooths wood by shaving off thin strips

1 :  to smooth or level off with a tool made for smoothing

2 :  to remove with or as if with a tool for smoothing wood

1a:  a surface that contains at least three points not all in a straight line and is such that a line drawn through any two points in it lies wholly in the surfaceb:  an imaginary plane used to identify parts of the body or a part of the skull—see frankfort horizontal plane, midsagittal plane

2:  a stage in surgical anesthesia a light plane of anesthesia is maintained with cyclopropane—Journal of the American Medical Association