To Click

1. (transitive) To cause to make a click; to operate (a switch, etc) so that it makes a click.
2. (intransitive) To emit a click.
3. (Britain) To snap the fingers.
4. (computing) To press and release (a button on a computer mouse).
5. (transitive, computing) To select a software item using, usually, but not always, the pressing of a mouse button.
6. (computing, advertising) To visit (a web site).
7. (intransitive, computing) To navigate by clicking a mouse button.
8. (intransitive) To make sense suddenly.
9. (intransitive) To get on well.
10. (dated, intransitive) To tick.
11. (transitive, India) To take (a photograph) with a camera.
12. (intransitive, India) To achieve success in one's career or a breakthrough, often the first time.
13. (intransitive, India) Of a film, to be successful at the box office.

Usage notes

Style guides for technical writers generally recommend using click transitively (for example: click the button), but intransitive use with on (click on the icon) is also widespread. The style guides do accept the use of in in phrases like click in the field.