extraneous in WordNet English dictionary

1. coming from the outside
   "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups"
   external  extraneous  outside 
   
2. not belonging to that in which it is contained; introduced from an outside source
   "water free of extraneous matter"; "foreign particles in milk"
   extraneous  foreign 
   
3. 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"
   extraneous  immaterial  impertinent  orthogonal 
   
4. not essential
   "the ballet struck me as extraneous and somewhat out of keeping with the rest of the play"
   extraneous