Webster's English Dictionary

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invention

in.ven.tion \in-'ven-ch*n\ n 1: DISCOVERY, FINDING  2: INVENTIVENESS  3a: 
   something invented : as  3a1: a product of the imagination; esp : a false 
   conception  3a2: a device, contrivance, or process originated after study 
   and experimen t 3b: a short keyboard composition usu. in double 
   counterpoint  4: the act or process of inventing