plane

adj

1. Of a surface: flat or level.

noun

1. A level or flat surface.
2. A flat surface extending infinitely in all directions (e.g. horizontal or vertical plane); a bounded portion thereof.

   “Mirrors in the compartments have been canted out of the vertical plane to reduce reflections to the passengers when seated.”

3. A flat surface extending infinitely in all directions (e.g. horizontal or vertical plane); a bounded portion thereof.
4. A level of existence or development.

   “astral plane”

   “Nettie's stories about her experiences in Africa point out many parallels between the African and American ways of life. Her stories about the African lifestyle and family structure, in particular, point out the sexist and oppressive conditions that women are forced to submit to on a global plane.”

5. A roughly flat, thin, often moveable structure used to create lateral force by the flow of air or water over its surface, found on aircraft, submarines, etc.
6. Any of 17 designated ranges of 2¹⁶ (65,536) sequential code points each.
7. (countable)A tool for smoothing wood by removing thin layers from the surface.
8. An airplane; an aeroplane.

   “on a plane”

   “The plane is travelling impossibly slowly – 30km an hour – when it gently noses up and leaves the ground. With air beneath them, the rangy wings seem to gain strength; the fuselage that on the ground seemed flimsy becomes elegant, like a crane vaunting in flight. It seems not to fly, though, so much as float.”

9. Any of various nymphalid butterflies, of various genera, having a slow gliding flight.
10. The butterfly Bindahara phocides, family Lycaenidae, of Asia and Australasia.
11. (countable)A deciduous tree of the genus Platanus.
12. (Northern-UK)A sycamore.

verb

1. (transitive)To smooth (wood) with a plane.
2. To move in a way that lifts the bow out of the water.
3. To glide or soar.