seersucker UK /ˈsɪəˌsʌk.ə/US /ˈsɪɹˌsʌk.ɚ/ noun2 •A thin, all-cotton fabric, commonly striped, used to make clothing for summer wear.I saw merely a lank, commonplace, and simple-looking farmer, going about his chores in faded blue overalls, a seersucker shirt, and a straw hat of the kind that is called a "cow's breakfast." — 1919 •An article made from such fabric. formsseersuckers