'orthogonal' definitions:

Definition of 'orthogonal'

From: WordNet
adjective
Not pertinent to the matter under consideration; "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point" [syn: extraneous, immaterial, impertinent, orthogonal]
adjective
Statistically unrelated
adjective
Having a set of mutually perpendicular axes; meeting at right angles; "wind and sea may displace the ship's center of gravity along three orthogonal axes"; "a rectangular Cartesian coordinate system" [syn: orthogonal, rectangular]

Synonyms of 'orthogonal'

From: Moby Thesaurus