Antonyms of noun brightness

1 of 3 senses of brightness

Sense 1
brightness -- (the location of a visual perception along a continuum from black to white)
       Antonym of dullness (Sense 3)
      => dullness -- (a lack of visual brightness; "the brightness of the orange sky was reflected in the dullness of the orange sea")

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

3 senses of brightness

Sense 1
brightness -- (the location of a visual perception along a continuum from black to white)
       => light, lightness -- (the visual effect of illumination on objects or scenes as created in pictures; "he could paint the lightest light and the darkest dark")

Sense 2
brightness, cleverness, smartness -- (intelligence as manifested in being quick and witty)
       => intelligence -- (the ability to comprehend; to understand and profit from experience)

Sense 3
luminosity, brightness, brightness level, luminance, luminousness, light -- (the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun")
       => physical property -- (any property used to characterize matter and energy and their interactions)