a worker who casts molten metal into finished products
"The lead caster carefully poured the molten alloy into the molds to create the intricate engine parts."
Someone or something that casts
"The old fishing rod acted as a caster, sending the lure skittering across the calm water."
To act as a caster
"After the team lost their point guard, they asked me to cast up because I had experience running the offense from that position."
A surname.
"Many people mistakenly think that Caster is a type of furniture leg, but in our family reunion photos, it clearly appears as a common surname among several relatives."