Definition of caster
1
:one that casts;
especially
:a machine that casts type
2
or
castor
play
\-tər\
a
:a usually silver table vessel with a perforated top for sprinkling a seasoning (such as sugar or spice)
b
:a usually revolving metal stand bearing condiment containers (such as cruets, mustard pot, and often shakers) for table use :a cruet stand
3
:any of a set of wheels or rotating balls mounted in a swivel frame and used for the support and movement of furniture, trucks, and portable equipment
4
:the slight usually backward tilt from vertical of the axis of the steering mechanism of an automobile for giving directional stability to the front wheels
