slumber slumber /ˈslʌmbɝ/

noun

1. () A natural and periodic state of rest during which consciousness of the world is suspended  ( slumber , sleep )
   a natural and periodic state of rest during which consciousness of the world is suspended
    He didn't get enough sleep last night
   he didn't get enough sleep last night
    Calm as a child in dreamless slumber
   calm as a child in dreamless slumber
   
   
2. A dormant or quiescent state  ( slumber )
   a dormant or quiescent state
   

verb

1. () Be asleep  ( catch some Z's [Informal, N. American] , kip , log Z's , sleep , slumber )
   be asleep
     She had trouble falling asleep due to the noise outside.
   She had trouble falling asleep due to the noise outside.