universe universe /ˈjuːnəˌvɝːs/

noun

1. () Everything that exists anywhere  ( creation , macrocosm , cosmos , existence , universe , world )
   everything that exists anywhere
    They study the evolution of the universe
   they study the evolution of the universe
    The biggest tree in existence
   the biggest tree in existence
   
   
2. Everything stated or assumed in a given discussion  ( universe , universe of discourse )
   everything stated or assumed in a given discussion
   
   
3. (statistics) the entire aggregation of items from which samples can be drawn  ( universe , population )
   (statistics) the entire aggregation of items from which samples can be drawn
    It is an estimate of the mean of the population
   it is an estimate of the mean of the population