changer

n. a machine or device that changes one thing for another, like a machine that swaps music discs.

n. a mechanical or electronic device designed to switch or replace one component with another automatically.

“The old record player had a disc changer that could hold five albums at once.”

“The automated tool changer on the factory floor significantly reduced the time required to switch between different manufacturing processes.”

n. a person whose job is to change money from one currency to another.

n. a person, often historical, whose profession involves exchanging different currencies or discounting bills of exchange.

“In the old market, the money changer helped travelers get the local coins they needed.”

“Historical accounts of the medieval trade fair describe the vital role of the money changer in facilitating international commerce.”

Archaic

n. a person or thing that causes a big change in a situation.

n. an agent, entity, or event that effects a significant transformation in a system or environment.

“The new CEO was a real changer who modernized the entire company culture.”

“Economists viewed the introduction of the new policy as a potential changer for the struggling regional market.”