an instrumentality invented for a particular purpose

change the nature, purpose, or function of something

a refractory-lined furnace used to convert pig iron into steel by the Bessemer process

a converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system

converter for changing information from one code to another

converter that converts alternating current into direct current or vice versa

(telecommunication) converter for converting a signal from one frequency to another