Antonyms of noun meaningfulness

1 sense of meaningfulness

Sense 1
meaningfulness -- (the quality of having great value or significance)
       Antonym of meaninglessness (Sense 2)
      => meaninglessness -- (the quality of having no value or significance; "he resented the meaninglessness of the tasks they assigned him")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun meaningfulness

1 sense of meaningfulness

Sense 1
meaningfulness -- (the quality of having great value or significance)
       => significance -- (the quality of being significant; "do not underestimate the significance of nuclear power")