Noun unimportance has 2 senses
  1. humbleness, unimportance, obscureness - the state of being humble and unimportant
    --1 is a kind of obscurity
  2. unimportance - the quality of not being important or worthy of note
    --2 is a kind of
    value
    Antonyms: importance
    --2 has particulars:
     inessentiality; pettiness, triviality, slightness; insignificance
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