This volume features eight peer-reviewed chapters based on papers presented at the 33rd Annual Symposium on Arabic Linguistics, held at the University of Toronto in 2019. The chapters are divided into four sections: sociolinguistics, phonetics and phonology, syntax, and first language acquisition. They present research on relatively well-studied Arabic varieties such as the Moroccan, Jordanian, and Emirati varieties as well as understudied varieties such as the Palestinian dialects of Gaza and Jaffa, and the Saudi dialects of Al-Ahsa, Ha’il, and Faifi. The chapters address linguistic phenomena that range from language variation and change, the phonemic status and feature composition of rhotics, and the realization patterns of emphatic fricatives to the grammaticalization of aspectual markers, the syntactic and pragmatic aspects of post-wh-questions, and the acquisition trajectory of the definite article. The volume makes valuable descriptive and theoretical contributions to Arabic linguistics.