the time between evening and morning.
occurring, done, presented, etc., during the night, especially the hours before midnight.
Compare daytime.

1350–1400; Middle English; see night, time Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To nighttime
Example sentences
Robins don't need the magnetic resonance imaging during the nighttime darkness.
Citrus, succulents, and other tender plants require protection when nighttime
  frost is predicted.
The nighttime chirping of geckos under the eaves gives way to a mynah bird's
  first bossy calls.
The stars, freed from the shine of the big nighttime flashlight, stood as
  precise bright dots.
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