button
n//bɔˈt̪oːn̪//knapp, pin, knopp
(clothing) A knob or disc that is passed through a loop or (buttonhole), serving as a fastener. [from mid-13th c.]
A mechanical device designed to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
(graphical user interface) An on-screen control that can be selected as an activator of an attached function.
(curling) The center (bullseye) of the house.
(poker) A plastic disk used to represent the person in last position in a poker game; also dealer's button.
(US) A badge worn on clothes, fixed with a pin through the fabric.
(botany) A bud.