im·ma·te·ri·al /ˌɪməˈtɪriəl/
  (a.)非物質的,無形的,精神的
  Im·ma·te·ri·al a.
  1. Not consisting of matter; incorporeal; spiritual; disembodied.
     Angels are spirits immaterial and intellectual.   --Hooker.
  2. Of no substantial consequence; without weight or significance; unimportant; as, it is wholly immaterial whether he does so or not.
  Syn: -- Unimportant; inconsequential; insignificant; inconsiderable; trifling.
  ◄ ►
  immaterial
       adj 1: of no importance or relevance especially to a law case; "an
              objection that is immaterial after the fact" [ant: material]
       2: without material form or substance; "an incorporeal spirit"
          [syn: incorporeal] [ant: corporeal]
       3: not consisting of matter; "immaterial apparitions"; "ghosts
          and other immaterial entities" [syn: nonmaterial] [ant:
          material]
       4: 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" [syn: extraneous, impertinent, orthogonal]
       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" [syn:
           indifferent]