n. Any knob or ball fastened to another body; specifically, such an object used to secure together different parts of a garment, to one portion of which it is fastened in such a way that it can be passed through a slit (called a buttonhole) in another portion, or through a loop.n. plural (used as a singular). A page: so called from the buttons, commonly gilt, which adorn his jacket.n. A knob of gold, crystal, coral, ruby, or other precious stone, worn by Chinese officials, both civil and military, on the tops of their hats as a badge of rank; hence, the rank itself: as, a blue button.n. A knob or protuberance resembling a button.n. A bud of a plant.n. A flat or elongated piece of wood or metal, turning on a nail or screw, used to fasten doors, windows, etc.n. A small round mass of metal lying at the bottom of a crucible or cupel after fusion.n. In an organ, a small round piece of leather which, when screwed on the tapped wire of a tracker, prevents it from jumping out of place.n. A ring of leather through which the reins of a bridle pass, and which runs along the length of the reins.n. In zoology: The terminal segment of the crepitaculum or rattle of a rattlesnake. See crepitaculum.n. In entomology, a knob-like protuberance on the posterior extremity of the larvæ of certain butterflies, also called the anal button or cremaster. Sometimes there is a second one, called the preanal button.n. plural A name given to young mushrooms, such as are used for pickling.n. plural Sheep's dung: sometimes used for dung in general.n. A small cake.n. A person who acts as a decoy.To attach a button or buttons to.To fasten with a button or buttons; secure, or join the parts or edges of, with buttons: often followed by up: as, to button up a waistcoat.To be capable of being buttoned.n. A finger-knob or key on the concertina and some accordions.n. In pathology, any small, rounded, circumscribed elevation on the cutaneous or mucous surface.To bud or form imperfect heads, offsets, rosettes, tubers, or bulbs: for example, the cauliflower buttons when the head sends up imperfect and irregular glomerules, thus destroying the symmetry and solidity of the head.