immaterial in WordNet English dictionary

1. 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 
   
2. not consisting of matter
   "immaterial apparitions"; "ghosts and other immaterial entities"
   immaterial  nonmaterial 
   
3. of no importance or relevance especially to a law case
   "an objection that is immaterial after the fact"
   immaterial 
   
4. without material form or substance
   "an incorporeal spirit"
   incorporeal  immaterial 
   
5. (often followed by `to') lacking importance; not mattering one way or the other
   "whether you choose to do it or not is a matter that is quite immaterial (or indifferent)"; "what others think is altogether indifferent to him"
   immaterial  indifferent