#unimportance  the quality of not being important or worthy of note
  exclusion:  importance
  supertype:  value  the quality (positive or negative) that renders something desirable or valuable; "the Shakespearean Shylock is of dubious value in the modern world"
  subtype:  inessentiality  not of basic importance
     subtype:  dispensability__dispensableness__dispensablenes  the quality possessed by something that you can get along without
  subtype:  triviality__pettiness__pettines__slightnes  the quality of being unimportant and petty or frivolous
  subtype:  insignificance  the quality of having little or no significance
     subtype:  meaninglessness__meaninglessnes  the quality of having great value or significance; "he resented the meaninglessness of the tasks they assigned him"
        subtype:  inanity__senselessness__senselessnes__mindlessnes__vacuity__pointlessness__pointlessnes  total lack of meaning or ideas
        subtype:  purposelessness__purposelessnes__aimlessnes  the quality of lacking any definite purpose
     subtype:  inconsequence  having no important effects or influence

No statement uses or specializes unimportance; click here to add one.