As a Noun: 1. The part of each period of twenty-four hours when it is dark outside, especially the time when most people are sleeping. English = night. 2. The period of time between the end of the afternoon and midnight, or between the end of the afternoon and the time when you go to bed. English = night. 3. The evening or night that will come at the end of today. English = tonight. As Modifier: 1. Used immediately next to a verb to mean the action takes place during the night. English = at night, nights, nightly. 2. Used immediately next to a verb to mean the action will take place during the night that will come at the end of today. English = tonight.