1 [I,T] to make a short sharp sound; to cause sth to do this （使）发出咔嗒声: The door clicked shut. 门咔嗒一声关上了。He clicked his fingers at the waiter. 他咔嗒一声朝服务员捻了捻手指。

2 [I,T] click (on sth)(computing计算机技术) to press one of the buttons on a mouse 点击（按鼠标上的按钮）: To open a file, click on the menu. 点击菜单，便可打开文件。Position the pointer and double click the left-hand mouse button(= press it twice very quickly). 摆正光标位置，双击鼠标上的左键。

3 [I] (Brit 英) (informal 非正式) (used about two people) to become friendly immediately （指人）一见如故，一拍即合: We met at a party and just clicked. 我们俩在酒会上相识，一见如故。

4 [I] (informal 非正式) (used about a problem, etc) to become suddenly clear or understood （指问题等）突然变得清晰易懂: Once I'd found the missing letter, everything clicked into place. 那封失踪的信找到以后，我就恍然大悟，什么事都明白过来了。