(rɪˈɡreɪt) vb (tr) 1. (Stock Exchange) to buy up (commodities) in advance so as to raise their price for profitable resale2. (Stock Exchange) to resell (commodities so purchased); retail3. (Building) building trades to redress the surface of (hewn stonework)[C15: from Old French regrater perhaps from re- + grater to scratch]reˈgratern