to take a machine apart or to come apart into separate pieces

She dismantled the washing machine to see what the problem was, but couldn't put it back together again. 她拆开洗衣机想看看出了什么问题，但是却装不起来了。

The good thing about the bike is that it dismantles if you want to put it in the back of the car. 这种自行车的好处是可以拆开放在汽车的后部。

to get rid of a system or organization, usually over a period of time

Over the next three years, we will be gradually dismantling the company and selling off the profitable units. 在未来的三年内，我们将逐步解散公司并出售盈利部门。

Unions accuse the government of dismantling the National Health Service. 工会指责政府企图破坏国民保健制度。