Webster's English Dictionary

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dic.tio.nary \'dik-sh*-.ner-e-\ n [ML dictionarium, fr. LL diction-, 
   dictio- word, fr. L, speak]ing 1: a reference book containing words usu. 
   alphabetically arranged along wit h information about their forms, 
   pronunciations, functions, etymologies, meanings, and syntactical and 
   idiomatic uses 2: a reference book listing alphabetically terms or names 
   important to a pa rticular subject or activity along with discussion of 
   their meanings and applications 3: a general comprehensive list, 
   collection, or repository of information a lphabetically arranged