Antonyms of adj nocturnal

1 of 2 senses of nocturnal

Sense 1
nocturnal (vs. diurnal) -- (belonging to or active during the night; "nocturnal animals are active at night"; "nocturnal plants have flowers that open at night and close by day")

diurnal (vs. nocturnal) -- (of or belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"; "diurnal and nocturnal offices")

Similarity of adj nocturnal

2 senses of nocturnal

Sense 1
nocturnal (vs. diurnal) -- (belonging to or active during the night; "nocturnal animals are active at night"; "nocturnal plants have flowers that open at night and close by day")

Sense 2
nocturnal -- (of or relating to or occurring in the night; "nocturnal darkness")