1 [C,U] something that shows clearly that sth exists or is true 论证；证明: This accident is a clear demonstration of the system's faults. 这宗意外清楚地证明了这系统的弊端。

2 [C,U] an act of showing or explaining to sb how to do sth or how sth works 示范: The salesman gave me a demonstration of what the computer could do. 售货员向我示范那部计算机的功能。

3 [C] a demonstration (against/for sb/sth) a public protest for or against sb/sth 示威: demonstrations against a new law 反对新法律的示威游行