Adjective ultraviolet has 1 sense
  1. ultraviolet - having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end; "ultraviolet radiation"; "an ultraviolet lamp"
    Antonyms:
    visible, seeable (indirect, via invisible)
,Noun ultraviolet has 1 sense
  1. ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UV - radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
    --1 is a kind of actinic radiation, actinic ray
    --1 has particulars: sunray, sun-ray
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