The Oxford Thesaurus An A-Z Dictionary of Synonyms - night n.

1) (Stygian or Cimmerian) dark or darkness or blackness or gloom; night-time, shades of night, Formal tenebrosity or tenebrousness or tenebriousness: The strange creature slunk off into the night. 2) nightfall, gloaming, twilight, dusk, eventide, evening, evensong, edge of night, sunset, sundown, end of day, vespers: When night comes, one can hear the frogs calling from the pond. 3) night and day. all the time, continually, incessantly, unceasingly, continuously, unendingly, endlessly, round-the-clock, ceaselessly, non-stop: Those animals keep up their caterwauling night and day.