As a Noun: 1. The natural state of rest in which your eyes are closed and your mind and body are inactive and unconscious, usually for several hours every night. English = sleep, sleeping. 2. A period of sleeping. English = sleep. As a Verb or Adjective: 1. To close your eyes in order to rest your mind and body. After some time you become inactive and unconscious for a period of minutes or hours. English = sleep, fall asleep, go to sleep.