1 a book that contains a list of the words in a language in the order of the alphabet and that tells you what they mean, in the same or another language 字典；词典: to look up a word in a dictionary 在词典里查一个词a bilingual/monolingual dictionary 双语╱单语词典

2 a book that lists the words connected with a particular subject and tells you what they mean 专科词典: a dictionary of idioms 习语词典a medical dictionary 医学词典