Wiktionary
n. (context computing English) The action of pushing the button on a mouse twice in quick succession in order to perform a different task that would be performed from a single-click or triple-click. vb. (context computing English) To push the button on a mouse twice in quick succession in order to perform a different task than would be performed from a single-click or triple-click.
Wikipedia
A double-click is the act of pressing a computer mouse button twice quickly without moving the mouse. Double-clicking allows two different actions to be associated with the same mouse button. It was developed by Bill Atkinson of Apple Computer for their Lisa project. Often, single-clicking selects (or highlights) an object, while a double-click executes the function associated with that object. Following a link in a web browser is accomplished with only a single click, requiring the use of a second mouse button, "click and hold" delay, or modifier key to gain access to actions other than following the link. On touchscreens, the double-click is called "double-tap"; it's not used as much as double-click, but typically it functions as a zoom feature. ("triple-tap" sometimes used to zoom the whole screen.)
Usage examples of "double-click".
Gogolov took a sip of his piping hot Russian chai, and double-clicked to read it again.
My hand shook as I double-clicked one of the Grim Reaper subject bars.
For a while, Tim kept hitting the return key and double-clicking on everything in sight.
She decided to check by double-clicking on one of the icons she didn’t recognize—it showed a red-and-black double helix.
Randy double-clicks on Ordo's eyeball/pyramid icon, and it opens up a little text window on the screen, where he is invited to type commands.
From Twister’s headset came a pair of acknowledging double-clicks as Shadow and Watchman confirmed his veiled order.
Select secondary text box from the merge menu, and double-click on the supplementary cleared document window.