Learn in the textbookTouch Gestures, Windows, and Icons
DefinitionA checkbox (チェックボックス) is a GUI selection control in which each item can be turned on or off independently, so any number of applicable items can be selected.
ExplanationIt appears as a square box, and selecting it puts a check mark inside. Because the items do not affect one another, you can select none or all of them. It is also used as a single item to confirm on or off, as when agreeing to terms of use.
AnalogyIt is like ticking off items one by one on a packing list as you get each one ready.
Memory hookThe look of putting a check into a square box gave it its name.