Tack may refer to: Tack, a type of cut nail, used in upholstery, shoe making and saddle manufacture Horse tack, harness and equipment to allow horse-back riding Tack (sewing) (also baste or pin), quick, temporary stitching intended to be removed Hardtack, a hard cracker or biscuit used for food on sea voyages and during the American Civil War Thumbtack or drawing pin, a short nail or pin easily placed and removed by hand Augustus Vincent Tack (1870-1949), American painter In sailing: Ta… (More on Tack)