The advanced learner's dictionary is the most common type of monolingual learner's dictionary, that is, a dictionary written in one language only, for someone who is learning a foreign language. It differs from a bilingual or translation dictionary, a standard dictionary written for native speakers, or a children's dictionary. Its definitions are usually built on a restricted defining vocabulary. "Advanced" usually refers learners with a proficiency level of B2 or above according to the Common European Framework. Basic learner's dictionaries also exist.
Although these advanced dictionaries have been produced for learners of several languages (including Chinese, Dutch, German, and Spanish), the majority are written for learners of English
