talk ‧ back /ˈtɔːkbæk $ ˈtɒːk-/ BrE AmE noun [uncountable]
an electronic system used in a film or television ↑ studio , so that someone can talk to someone else without other people hearing them
talk ‧ back /ˈtɔːkbæk $ ˈtɒːk-/ BrE AmE noun [uncountable]
an electronic system used in a film or television ↑ studio , so that someone can talk to someone else without other people hearing them
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012