Meaning of Overton window in English:

Overton window

noun

US the Overton window
  • The spectrum of ideas on public policy and social issues considered acceptable by the general public at a given time.

    • ‘I suppose the Overton window is shifting, but slowly’

Origin

Early 21st century named after Joseph P. Overton (1960–2003) former vice president of the Mackinac Center for Public Policy in the US, who developed the concept.