"a caster of spells; a caster of stones; a caster of bronze statuary; an online caster of video games"
2.nounA wheeled assembly attached to a larger object at its base to facilitate rolling. A caster usually consists of a wheel (which may be plastic, a hard elastomer, or metal), an axle, a mounting provision (usually a stem, flange, or plate), and sometimes a swivel (which allows the caster to rotate for steering).
"Many office chairs roll on a set of casters."
3.nounA shaker with a perforated top for sprinkling condiments such as sugar, salt, pepper, etc.
"a set of casters"
4.nounA stand to hold a set of shakers or cruets.
5.nounThe angle of the axis around which a car's front wheels rotate when the steering wheel is turned, with a vertical axis being defined as zero caster.