dictionary
US /ˈdɪk.ʃən.er.i/
UK /ˈdɪk.ʃən.er.i/

1.
dizionario
a book or electronic resource that lists the words of a language (typically in alphabetical order) and gives their meaning, or gives the equivalent words in a different language, often also providing information about pronunciation, origin, and usage.
:
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I looked up the word in the dictionary.
Ho cercato la parola nel dizionario.
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This online dictionary is very helpful for learning new languages.
Questo dizionario online è molto utile per imparare nuove lingue.