A plane which declines from the zenith, or inclines toward the horizon.

(anatomy) the plane which divides the body of an animal into similar right and left halves

(mechanics) One of the simple machines; a sloping surface such as a ramp such that an object can be raised with less effort than being lifted vertically.

(aircraft, military) A military aircraft primarily designed to attack enemy aircraft. Frequently shortened to fighter.

(mathematics, astronomy) The mean plane occupied by the orbit of a satellite during a precession cycle; the plane normal to the orbital precession pole of the satellite.

In art, the imaginary plane correspondent with the physical surface of a drawing, painting or print.

An airplane that supposedly could detect oil fields underground.

A rebate plane.

a hand plane designed for cutting rebates in wood

(geometry) The set of all points in a planar coordinate system.