Definition of Arba'ah turim

Arba'ah Turim (ארבעה טורים), often called simply the Tur, is an important Halakhic code, composed by Yaakov ben Asher (Spain, 1270 -c.1340, also referred to as "Ba'al ha-Turim", "Author of the Tur"). The four-part structure of the Tur and its division into chapters (simanim) were adopted by the later code Shulchan Aruch.