say it: awr-THAW-guh-nuhl
orthogonal is an adjective meaning "not pertinent to the matter under consideration". It carries 3 recorded senses.
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”
statistically unrelated
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”
Definitions, synonyms and semantic relations for orthogonal come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.