定量dìngliàng 1.测定物质所含各种成分的数量{determine the quantities of different components in a substance}: ～分析。{quantitative analysis} 2.规定数量{fix the quantity}: ～供应{ration; fixed supply}|定质～。{with set quality and quantity} 3.规定的数量{fixed quantity}: 超出～。{exceed the fixed quantity}