Definitions for starch

(a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles)

(a commercial preparation of starch that is used to stiffen textile fabrics in laundering)

(stiffen with starch; "starch clothes")