button

noun

1. A knob or disc that is passed through a loop or (buttonhole), serving as a fastener.
2. A mechanical device designed to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
3. An on-screen control that can be selected as an activator of an attached function.
4. A badge worn on clothes, fixed with a pin through the fabric.
5. A bud.
6. The calyx of an orange.
7. The head of an unexpanded mushroom.
8. The clitoris.
9. The center (bullseye) of the house.
10. The soft circular tip at the end of a foil.
11. A plastic disk used to represent the person in last position in a poker game; also dealer's button.
12. The player who is last to act after the flop, turn and river, who possesses the button.
13. A person who acts as a decoy.
14. A raised pavement marker to further indicate the presence of a pavement-marking painted stripe.
15. The end of a runway.
16. A methaqualone tablet (used as a recreational drug).
17. A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, such as a door.
18. A globule of metal remaining on an assay cupel or in a crucible, after fusion.
19. A knob; a small ball; a small, roundish mass.
20. A small white blotch on a cat's coat.