diurnal
1 antonym for diurnal — opposites grouped by meaning.
Adj — Taking place, or most active, during the day rather than at night.
Synonyms by Meaning
2. adj
Following a pattern that repeats once every 24 hours, such as a tide or body cycle.
Antonyms
Etymology
This word comes from Latin diurnālis, from diēs (“day”), and is a doublet of journal.
Full origin of diurnal →