Caster \Cast"er\, n. 1. One who casts; as, caster of stones, etc.; a caster of cannon; a caster of accounts. [1913 Webster] 2. A vial, cruet, or other small vessel, used to contain condiments at the table; as, a set of casters. [1913 Webster] 3. A stand to hold a set of cruets. [1913 Webster] 4. A small wheel on a swivel, on which furniture is supported and moved. [1913 Webster]