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

1 sense of nighttime

Sense 1
night, nighttime, dark -- (the time after sunset and before sunrise while it is dark outside)
       => time period, period of time, period -- (an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period")

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