Plane (geometry), abstract surface which has infinite width and length, zero thickness, and zero curvature
Lattice plane, a plane in a crystal structure
Clipping plane, in computer graphics
Planing (boat), a method of travelling quickly across water by using speed to lift the hull out of the water
Platanus, a genus of trees with the common name "plane"
Acer pseudoplatanus, an unrelated tree species sometimes confused with the planes, owing to a resemblance in their leaf shape
Bindahara phocides, a species of butterfly of the family Lycaenidae
Planes (genus), a genus of crabs in the family Grapsidae called "weed crabs"
Plane (Unicode), in Unicode, a big range of 65,536 (=216) code points
Plane, a conceptual part of a telecommunications network
Anatomical plane, a hypothetical plane used to transect the body
"Planes" (song), by Jeremih
"Planes", a 1989 song by Jefferson Airplane
"Planes", a 1967 comedy sketch by Bill Cosby
"Planes", a 1976 song by Colin Blunstone
Planes (film), a 2013 3D animated film
Plane (Dungeons & Dragons), a distinct location in the multiverse in Dungeons & Dragons
Plane (Magic: The Gathering), a unique universe in the multiverse of Magic: The Gathering
Planes: Fire & Rescue, an American 3D computer-animated comedy-adventure film for release on 18 July 2014. It is a sequel to Planes
Plane (tool), a woodworking tool to smooth surfaces
Plane (river), a river in eastern Germany.
Plane (wherry), a Norfolk wherry in service 19311949
Plane (esotericism), an emergent state, level or region of reality
Plans, a commune in the south of France
Planes, Alicante, a municipality in the province of Alicante, Spain
Physical plane, the physical universe in emanationist metaphysics
The Inner Planes, the material building blocks of reality and the realms of energy and matter, stand in contrast to the intangible and esoteric Outer Planes, which include the realms of ideals, philosophies, and gods.
The Planes serve as a home for extraplanar creatures which magic-users can summon. High-level adventurers can quest on the Planes, which are usually dangerous without protective magic.
In the first edition there were initially four Inner Planes, consisting of the four classical elements of fire, earth, air and water, as well as the energy planes of positive and negative material, and the ethereal plane.
In Advanced Dungeons & Dragons 2nd edition, the Inner Planes intersect each other to produce a number of other Planes. Probably the best analogy describing their relationship to each other is that of an octahedron: the northern pole is the Positive Energy Plane, the southern pole the Negative Energy Plane, and at the middle four points lie the Elemental Planes (based on the four classical elements): Air opposite Earth, Fire opposite Water. They were an important part of the Planescape setting. Each edge is also either a para-elemental or quasi-elemental plane of its own.