CLICK

A brief, sharp, not particularly loud, relatively high-pitched sound produced by the impact of something small and hard against something hard, such as by the operation of a switch, a lock or a latch, or a finger pressed against the thumb and then released to strike the hand.

"I turned the key, the lock gave a click and the door opened;  a click of one’s fingers"

An ingressive sound made by coarticulating a velar or uvular closure with another closure.

Sound made by a dolphin.

To cause to make a click; to operate (a switch, etc) so that it makes a click.

To press and release (a button on a computer mouse).

To select a software item using, usually, but not always, the pressing of a mouse button.

The sound of a click.

"Click! The door opened."