Căs'sock, n.

n. [From Fr. casaque, Sp. & Pg. casaca, It. casacca, from Lat. casa, cottage, in It., Sp., Pg., & Pr. house, O. Fr. case.]

1. A loose cloak or gown worn over other garments. [Obs.] Shak.
2. (Eccl.) A close garment, resembling a long frock coat, worn by clergymen of the Roman Catholic and Episcopal churches, under the surplice or gown. Hook.