Here are the most common radio terms:

An abbreviation for the Average Quarter Hour. It averages all dayparts to determine the number of persons listening to a particular radio station for at least five minutes during a 15-minute period.

Cume is the number of different persons who tune to a radio station during the course of a daypart for at least five minutes.

Designated times during the day that are broken down into specific time periods in order to rank station listeners hip. For example, the morning drive daypart is 5:00 a.m. to 10:00 a.m.

The type of programming a station broadcasts, i.e., adult contemporary, country, news, etc.

Gross Impressions
The audience reach or the number of “impressions” a spot had on listeners in all markets with all stations.