1a small disc or knob sewn on to a garment, either to fasten it by being pushed through a slit made for the purpose or for decoration. a small round object resembling a button:chocolate buttons Fencing a knob fitted to the point of a foil to make it harmless. used in reference to things of little worth:he will never give away anything that is worth a button 2a small device on a piece of electrical or electronic equipment which is pressed to operate it.
chiefly North American a badge bearing a design or slogan and pinned to clothing.
1 [with object] fasten (clothing) with buttons:he buttoned up his jacket
(button someone into
) fasten the buttons of a garment being worn by someone:he buttoned himself into the raincoat
[no object] (of a garment) be fastened with buttons:a dress which buttoned down the front
(usually in imperative button it
) informal stop talking.