Chinese dictionaries date back over two millennia to the Han dynasty, which is a significantly longer lexicographical history than any other language. There are hundreds of dictionaries for the Chinese language, and this article discusses some of the most important.
The general term císhū (辭書, "lexicographic books") semantically encompasses "dictionary; lexicon; encyclopedia; glossary". The Chinese language has two words for dictionary: zidian (character/logograph dictionary) for written forms, that is, Chinese characters, and cidian (word/phrase dictionary), for spoken forms.
For character dictionaries, zidian () combines zi (字 "character, graph; letter, script, writing; word") and dian (典 "dictionary, encyclopedia; standard, rule; statute, canon; classical allusion").
For word dictionaries, cidian is interchangeably written (辭典/辞典; cídiǎn; tzʻŭ2-tien3; "word dictionary") or (詞典/词典; cídiǎn; tzʻŭ2-tien3; "word dictionary"); using cí (辭; "word, speech; phrase, expression; diction, phraseology; statement; a kind of poetic prose; depart; decline; resign"), and its graphic variant cí (詞; "word, term; expression, phrase; speech, statement; part of speech; a kind of tonal poetry"). Zidian is a much older and more common word than cidian, and Yang notes zidian is often "used for both 'character dictionary' and 'word dictionary'.
The precursors of Chinese dictionaries are primers designed for students of Chinese characters. The earliest of them only survive in fragments or quotations within Chinese classic texts. For example, the Shizhoupian (史籀篇) was compiled by one or more historians in the court of King Xuan of Zhou (r. 827 BCE – 782 BCE), and was the source of the 籀文 zhòuwén variant forms listed in the Han dynasty Shuowen Jiezi dictionary. The Cangjiepian (倉頡篇 "Chapters of Cang Jie"), named after the legendary inventor of writing, was edited by Li Si, and helped to standardize the Small seal script during the Qin dynasty.
The collation or lexicographical ordering of a dictionary generally depends upon its writing system.