An ~ is a company whose business is to create advertisements for other companies or organizations.
Advertising agencies are losing their once-powerful grip on brand marketing.
N-COUNT
An ~ is a company whose business is to create advertisements for other companies or organizations.
Advertising agencies are losing their once-powerful grip on brand marketing.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012