Definition of "left-click" [left-click]

• To press the left button on a computer mouse. (verb)
• To activate an item on the screen by left-clicking while the pointer is over it. (verb)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "Surprise, the left-click on my trackball was all worn out!"
• "He also changed the left-click behaviour to switch to the last window you were using of a particular application instead of popping up the preview list — clicking more than once will cycle through the list of open windows, and hovering over the button will still show the thumbnail previews."
• "Highlight (left-click and drag) to see the hidden text."