nighttime

1. 1

   The hours of darkness between sunset and sunrise; the night.countableuncountable

   • Nighttime fell like the opening / In the final act of the beginning of time
   • Smith Barney, for example, goes so far as to shift the hours during which taxi rides home are expensable as nighttime lengthens and shortens, says Moszkowski.

ant. day · daytime

1. 1

   Pertaining to nighttime; appropriate to the night.not-comparable

2. 2

   Happening during the night.not-comparable

   • Discourage nighttime prowlers by installing motion-sensitive lights.

ant. day · daytime · diurnal