Webster's English Dictionary

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registration

reg.is.tra.tion \.rej-*-'stra--sh*n\ n 1: an act or the fact of registering 
    2: an entry in a register  3: the number of individuals registered : 
   ENROLLMENT  4a: the art or act of selecting and adjusting pipe organ stops  
   4b: the combination of stops selected for performing a particular organ wor 
   k 5: a document certifying an act of registering