the total stock of words and characters in a language; a person's individual vocabulary; a glossary or lexicon

the repertoire of characters available in a computing or encoding system

A 17th-century Chinese dictionary compiled by Mei Yingzuo in the Ming Dynasty, notable for simplifying radicals into the 214-member system used in later dictionaries like the 康熙字典 kāng​xī​zì​diǎn.