test group UK US noun [C] MARKETING
► a group of people who try a product or service to see how well it works, and whether they like it or would buy or use it: »
We always play the scripts for our ads to test groups of viewers before we finalize them.
► a group of products that are tested and compared to each other: »
Every inkjet printer in our test group printed sharp text.
Financial and business terms. 2012.