1. One that converts, especially:
   1. A furnace in which pig iron is converted into steel by the Bessemer process.
   2. A machine that converts electric current from one kind to another.
   3. An electronic device that converts one frequency of a radio signal to another.
   4. A device that converts data from one code to another.
2. One that is employed in converting raw products into finished products.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.