noun
: a small group of people whose response to something (as a new product or a politician's image) is studied to determine the response that can be expected from a larger population
noun
: a small group of people whose response to something (as a new product or a politician's image) is studied to determine the response that can be expected from a larger population
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012