dictionary dictionary /ˈdɪkʃəˌnɛri/

noun

1. () A reference book containing an alphabetical list of words with information about them  ( lexicon , dictionary )
   a reference book containing an alphabetical list of words with information about them
    If you don't know the meaning of a word, look it up in the dictionary
   If you don't know the meaning of a word, look it up in the dictionary