Caster - Wikipedia, the free encyclopedia A caster (or castor) is an undriven, single, double, or compound wheel that is designed to be mounted to the bottom of a larger object (the "vehicle") so as to ...
Caster - Definition and More from the Free Merriam-Webster Dictionary a small wheel attached to the bottom of something (such as a piece of furniture) to make it easier to move. Full Definition of CASTER. 1. : one that casts ...