extraneous

1. not pertinent to the matter under considerationExamples: "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point"Synonyms: extraneous, immaterial, impertinent, orthogonal

2. not essentialExamples: "the ballet struck me as extraneous and somewhat out of keeping with the rest of the play"Synonyms: extraneous

3. not belonging to that in which it is contained; introduced from an outside sourceExamples: "water free of extraneous matter"; "foreign particles in milk"Synonyms: extraneous, foreign

4. coming from the outsideExamples: "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups"Synonyms: external, extraneous, outside