Final answer:
A telescreen is a surveillance device described in George Orwell's novel, 1984, that broadcasts propaganda and monitors citizens' activities and conversations, representing loss of privacy and constant surveillance.
Step-by-step explanation:
A telescreen is a fictional device described in George Orwell's novel, 1984. It is a two-way television that not only broadcasts propaganda from the government but also monitors and records the activities and conversations of the citizens. The telescreens are a tool of surveillance and control employed by Big Brother to maintain totalitarian rule.
These telescreens represent the theme of constant surveillance and loss of privacy in the dystopian society depicted in the novel. They serve as a constant reminder that the Party is always watching and listening. The citizens are effectively stripped of their freedom and individuality.