noun A pigsty. (It was a complete sty; papers littered the ground, dirty dishes were in the sink, and the windows were covered with a grimy film.)
verb Keep (a pig) in a sty.
noun An inflamed swelling on the edge of an eyelid, caused by bacterial infection of the gland at the base of an eyelash. (Usually the staphylococcal bacteria are not concentrated enough to do any harm, but sometimes they pass deeper into the skin to cause boils, abscesses, styes and carbuncles.)