1. [ noun ] the time after sunset and before sunrise while it is dark outside
Synonyms: night dark
Related terms: day time_period wedding_night weeknight day midnight lights-out late-night_hour small_hours evening
2. [ adjective ] happening during or appropriate to the night

"nighttime attire" "the cat's nighttime prowls"

Related terms: daytime nightly nocturnal nocturnal
Similar spelling:   nightmare