Short for "cumulative audience", it's the total number of listeners a radio station has over
the course of an average week. Total amount of time spent
listening does not matter...if you listen to station A for
fifteen minutes one day and station B three hours every day, you're still cumed to both stations.
If you
regularly listen to three radio stations over
the course of a week, then you cume three stations, and thos three stations would
consider you part of their cume.