Webster's English Dictionary

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catapult

1. cat.a.pult \'kat-*-.p*lt, -.pu.lt\ n [MF or L; MF catapulte, fr. L 
   catapulta, fr. Gk katapalte-sX, fr. kata- + pallein to hurl - more at 
   POLEMIC 1: an ancient military device for hurling missiles  2: a device for 
   launching an airplane at flying speed 
2. catapult vt : to throw or launch by or as if by a catapult to become 
   catapulted