A button (of a joystick, joypad or similar device) that, when pressed, activates any of certain predefined functions that usually, but not always, involve selecting something out of a list of items.

To choose one or more elements of a set, especially a set of options. / (databases) To obtain a set of data from a database using a query.

Privileged, specially selected. / Of high quality; top-notch.

Capable of being selected

(graphical user interface) An item that can be selected by the user.

plural of selectability

The ability to be selected. / Worth; the appropriateness for being selected. / The ability to be selected from.

plural of selectant

The result of a selection process

In a selectable manner; controlled by selection.