Extraneous(a.) Unneeded; not essential or intrinsic; Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign; as, to separate gold from extraneous matter.
Thesaurus Entries
accidental, added, additional, adrift, adventitious, alien, apart, barbarian, barbaric, barbarous, beside the mark, beside the point, beside the question, detached, disconnected, discrete, disjunct, disrelated, dissociated, exotic, exterior, external, extra, extraorganismal, extraterrestrial, extrinsic, foreign, foreign-born, immaterial, impersonal, impertinent, inadmissible, inapplicable, inapposite, inappropriate, inapt, incidental, incommensurable, incomparable, inconsequent, independent, inessential, insular, intrusive, irrelative, irrelevant, isolated, needless, nihil ad rem, nonessential, nonsubjective, not at issue, objective, off the subject, other, out of place, out-of-the-way, outland, outlandish, outlying, outside, outward, parenthetical, peripheral, pointless, remote, removed, segregate, separate, separated, strange, superfluous, supernumerary, ulterior, unaffiliated, unallied, unapt, unassociated, unconnected, unearthly, unessential, unfitting, unnecessary, unneeded, unrelatable, unrelated