This research paper aimed to study the idioms lexicalization in medium sized
monolingual dictionaries as an attempt to combine theorization and practice of
contemporary lexicography. Theorization, or the theoretical part of the research, is
dedica
ted to study idioms definition, aspects and types.
To achieve this target, the paper focuses on the theoretical aspect of idioms regarding
institutional lexicons (collaborative work) as exemplified in al-Muʿğam al-Wasīṭ of Cairo
Academy of the Arabic Language. The paper depends on studying individually collected
lexicons of Al- Munğid by Louis Maʿlūf as applied examples on the practical level.
