a long, closefitting vestment, generally black, worn as an outer garment or under the surplice by members of the clergy, choristers, etc.
Origin of cassockFrench casaque; probably from Turkish qazaq, nomad, adventurer (from source Russian kozak, Cossack); in allusion to their usual riding coat
An ankle-length garment with a close-fitting waist and sleeves, worn by the clergy and others assisting in church services.
Origin of cassockFrench casaque long military coat from Middle French probably originally meaning “Cossack coat” and ultimately ( probably via Old Russian kozakŭ free man, Cossack ) of Turkic origin akin to Tatar qazaq free man, adventurer and Kazakh qazaq Kazakh ; see Kazakh .
From Middle French casaque (“cloak”).