The Collaborative International Dictionary of English v.0.48:

Universe \U"ni*verse\, n. [L. universum, from universus
   universal; unus one + vertere, versum, to turn, that is,
   turned into one, combined into one whole; cf. F. univers. See
   One, and Verse.]
   All created things viewed as constituting one system or
   whole; the whole body of things, or of phenomena; the to~
   pa^n of the Greeks, the mundus of the Latins; the world;
   creation.
   [1913 Webster]

         How may I
         Adore thee, Author of this universe
         And all this good to man!                --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

universe
    n 1: everything that exists anywhere; "they study the evolution
         of the universe"; "the biggest tree in existence" [syn:
         universe, existence, creation, world, cosmos,
         macrocosm]
    2: (statistics) the entire aggregation of items from which
       samples can be drawn; "it is an estimate of the mean of the
       population" [syn: population, universe]
    3: everything stated or assumed in a given discussion [syn:
       universe, universe of discourse]