(1) A button on a smartphone, tablet or other electronic device that takes the user to the start screen (home screen). The button may be physical hardware or displayed on the touchscreen ("virtual ...

Tapping the home button displays the start screen. Contrast with a "physical home button," which is hardware and must be depressed. See home button. THIS DEFINITION IS FOR PERSONAL USE ONLY.

With the release of iOS 4 in 2010, Apple introduced app switching: By clicking the Home button twice, you could reveal a new menu at the bottom of your screen with all of your recently-used apps.