Noun
a stop that keeps open doors from moving
Source: WordNetMost so-called doorstopper novels contain multitudes of characters, conflicts, decades, or even footnotes. Source: Internet
TV ads blared out the doorstopper specials for weeks in advance. Source: Internet
It’s a doorstopper, but other than one brief dip, the pacing keeps the pages turning, while the details reward close reading. Source: Internet