Antonyms of adj crepuscular

1 sense of crepuscular

Sense 1
crepuscular -- (like twilight; dim; "the evening's crepuscular charm")

INDIRECT (VIA dark) -> light -- (characterized by or emitting light; "a room that is light when the shutters are open"; "the inside of the house was airy and light")

Similarity of adj crepuscular

1 sense of crepuscular

Sense 1
crepuscular -- (like twilight; dim; "the evening's crepuscular charm")
       => dark (vs. light) -- (devoid of or deficient in light or brightness; shadowed or black; "sitting in a dark corner"; "a dark day"; "dark shadows"; "dark as the inside of a black cat")

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