Noah Webster's New International Dictionary of the English Language

1. (n.) One who casts; as, caster of stones, etc. ; a caster of cannon; a caster of accounts.

2. (n.) A vial, cruet, or other small vessel, used to contain condiments at the table; as, a set of casters.

3. (n.) A stand to hold a set of cruets.

4. (n.) A small wheel on a swivel, on which furniture is supported and moved.