From Longman Dictionary of Contemporary Englishcassockcas‧sock /ˈkæsək/ noun [countable] DCCa long, usually black, piece of clothing worn by priests
Examples from the Corpus
cassock• Corrigan lifted his cassock at the knees.• His cassock came up over his socks.• Mr Copley, robed in cassock and billowing surplice, was impatiently pacing the back lawn seeming oblivious to their presence.• Sophia could imagine them in cassocks, doing something with candles or incense.• On the live Bishop the silver pectoral cross rose and fell on the purple cassock.• The priest's cassock was stained with vomit and blood.• Roused, the Monsignor hiked the skirt of his voluminous cassock and lumbered up to the podium.Origin cassock (1500-1600) French casaque “long coat”, probably from Persian khazaghand, from kazh “silk” + aghand “filled with soft material” 