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Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   Leo
       n 1: (astrology) a person who is born while the sun is in Leo
            [syn: Leo, Lion]
       2: a zodiacal constellation in northern hemisphere between
          Cancer and Virgo
       3: the fifth sign of the zodiac; the sun is in this sign from
          about July 23 to August 22 [syn: Leo, Leo the Lion,
          Lion]