(physics) A specification of the energy and probability density of one or more electrons at any point in an atom or molecule, and can be represented as a wave function.

(chiefly UK) Ellipsis of orbital motorway.

Short for orbital sander.

Of or relating to, or forming an orbit (such as the orbit of a moon, planet, or spacecraft).

(anatomy) Of or relating to the eye socket (eyehole).

(of roads, railways) (chiefly UK) Passing around the outside of an urban area.