Lexicography is the art and science of compiling, writing, and editing dictionaries. It involves the systematic collection and analysis of words, their meanings, pronunciations, and usage in various contexts. Lexicographers, the professionals who engage in this work, ensure that dictionaries are accurate, comprehensive, and user-friendly. There are two main types of lexicography: descriptive and prescriptive. Descriptive lexicography focuses on documenting how language is used in real life, while prescriptive lexicography aims to establish rules for correct language use. Both approaches contribute to the development of resources like Oxford English Dictionary and Merriam-Webster.