(on a lathe) a perforated plate, mounted on the live spindle, to which the work is attached.
2.
the part of a protective headpiece, as a diver's or astronaut's helmet, that covers the upper portion of the face, often of transparent material and sometimes movable.
3.
Also called face. Electronics. the glass front of a cathode ray tube upon which the image is displayed.
4.
a protective plate, as one surrounding an electric outlet or light switch.