The period of darkness during each 24-hour day.
From night + time, the period of darkness during each 24-hour day.
- The city is particularly beautiful at nighttime, when the lights are on.
- Many animals are active during nighttime hours.
- The nighttime temperature was much cooler than during the day.
- She always felt more alert and productive during nighttime hours.
- The store was closed, it was nighttime.