A1 a book that contains a list of words in alphabetical order and that explains their meanings, or gives a word for them in another language; a similar product for use on a computer字典，词典
a book that gives information about a particular subject, in which the entries (= words or phrases) are given in alphabetical order专业词典，专门词典
"Is that the correct spelling?" "I don't know - look it up in a dictionary."
In this dictionary, verbs which are intransitive are marked [I].
Count nouns are shown in this dictionary with [C].
This dictionary went online in 1999.
Notes on how to use this dictionary can be found at the beginning of the book.