What is Advanced learner's dictionary?

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 , the majority are written for learners of English.