master signifier

noun1

1. •
   A signifier, i.e. a linguistic sign, with no determinate content beyond itself, serving as a nodal point dominating and grounding the content of a chain of other signifiers.

   • It is the broader umbrella concept of cultural re-birth that acts as a master signifier suturing the vast spectrum of Islamism, from its peaceful articulations to its more violent manifestations. — 2021