To make a short, sharp sound, often by pressing a button, such as on a mouse or camera. As a noun, it is the sound itself or a single press of a button.
Probably imitative of the sharp sound itself, like many sound-based words. It has been used for various small snapping or tapping noises.
The word is pure sound turned into language—your tongue can even "click" to demonstrate it. In the digital age, that tiny noise grew into a whole economy, where every online "click" can be counted, sold, and chased.
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