plane

⁴plane

noun

Definition of PLANE

1

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

2

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

3

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

Origin of PLANE

Latin planum, from neuter of planus level

First Known Use: 1571

Other Aeronautics/Aerospace Terms

airway, apron, corridor, dirigible, fishtail, flat-hat, vector