Webster's English Dictionary

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input

in.put \'in-.pu.t\ n 1: something that is put in; esp : an amount put in : 
   power or en ergy put into a machine or system for storage or for conversion 
   in kind or conversion of characteristics 2: the terminal for an electrical 
   input  3: information fed into a computer or accounting machine  4: the act 
   or process of putting in