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Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   Hubble
       n 1: United States astronomer who discovered that (as the
            universe expands) the speed with which nebulae recede
            increases with their distance from the observer (1889-1953)
            [syn: Hubble, Edwin Hubble, Edwin Powell Hubble]