A book which explains or translates, usually in alphabetical order, the words of a language or languages (or of a particular category of…

A dictionary (sometimes ‘a polyglot’); figurative one's book of authority or reference; one's notebook or memorandum-book.

a dictionary (also in the titles of dictionaries).

A word-book or dictionary; chiefly applied to a dictionary of Greek, Hebrew, Syriac, or Arabic.

A dictionary, esp. humorously represented as a person.

= dictionary, n.

A ‘treasury’ or ‘storehouse’ of knowledge, as a dictionary, encyclopædia, or the like.