plane (n) - flat surface, simplest of all geometrical surfaces

plane (n) - short for 'aeroplane', originally in reference to surfaces such as shell casings of beetle wings, later extended to the wing of a heavier-than-air flying machine, then to the machine itself

plane (n) - tool for smoothing surfaces

plane (n) - tree of the genus platanus, native to Persia and the Levant

plane (v) - to make smooth

plane (v) - to soar, to glide on motionless wings

plane (adj) - having the characteristics of a plane