(1) A non-curved screen on a TV. Contrast with curved screen. See flat screen. (2) A reference to TVs when LCD screens were replacing CRTs starting in the late 1990s and early 2000s. See flat screen.

The late '90s brought about a huge forward leap in television technology with Fujitsu's flat plasma television ... that ...

[Igor] helped his friend’s family out by retrofitting an old Philco television with a newer flat panel ... store to find a TV which would fill the opening. With the new screen in hand he ...