NIGHTTIME
night, nighttime, dark
(noun) the time after sunset and before sunrise while it is dark outside
Source: WordNet® 3.1
Etymology
Noun
nighttime (countable and uncountable, plural nighttimes)
The hours of darkness between sunset and sunrise; the night.
Synonyms
• nightertale, nighttide; see also nighttime
Antonyms
• day, daytime; see also daytime
Adjective
nighttime (not comparable)
Pertaining to nighttime; appropriate to the night.
Happening during the night.
Synonyms
• (pertaining to nighttime): night
• (happening during the night): night, nocturnal
Antonyms
• (pertaining to nighttime): day, daytime
• (happening during the night): daytime, diurnal
Source: Wiktionary
Night"time`, n.
Definition: The time from dusk to dawn; -- opposed to Ant: daytime.
Source: Webster’s Unabridged Dictionary 1913 Edition