doorstopper noun3 •A doorstop: a device for halting the motion of a door. •(humorous) A large book, which by implication could be used to stop a door.So Steven Pinker is stretching the genre with his 450-page doorstopper Enlightenment Now: A Manifesto for Science, Reason, Humanism and Progress. — 2018 •A gauge used in geophysics. formsdoorstoppers
