1a device for holding a workpiece in a lathe or a tool in a drill, typically having three or four jaws that move radially in and out:a power-drill chucka three-jaw chuck
2 [mass noun] (also chuck steak) a cut of beef that extends from the neck to the ribs, typically used for stewing:the trays of fat-speckled chuck and sweetbreads had been put in the refrigerator
Origin:
late 17th century, as a variant of chock; see also chunk1
