extraneous

1 not being a vital part of or belonging to something the architect's streamlined modern style shuns any sort of extraneous ornamentation Synonyms accidental, adventitious, alien, extrinsic, external, foreign, supervenientRelated Words exterior, outside; immaterial, inapplicable, insignificant, irrelevant; nonessential, unessential, unnecessaryNear Antonyms congenital, deep-seated, inborn, inbred; inside, interior, internal; basic, essential, necessaryAntonyms inherent, innate, intrinsic

2 not having anything to do with the matter at hand the professor would have covered all of the course material if she had refrained from her extraneous remarks on just about everything Synonyms irrelevant, immaterial, impertinent, inapplicable, inapposite, irrelativeRelated Words incidental, peripheral, tangent, tangential; dead, moot; inconsequential, insignificant, unimportant; empty, inane, meaningless, pointless, senseless, useless; inappropriate, inapt, unsuitableNear Antonyms important, meaningful, significant; sensible, useful; appropriate, apt, fit, suitableAntonyms applicable, apposite, apropos, germane, material, pertinent, pointed, relative, relevant