1. One that changes something: an inveterate changer of decor.
2. A device that causes each of a series of audio or audiovisual recordings to be played automatically: a record changer; a compact disk changer.

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.