Translation of "cornerstone" - English-Spanish dictionary

cornerstone

noun uk /ˈkɔː.nə.stəʊn/

a stone in a corner of a building, especially one with the date when the building was made or other writing on it

piedra angular

something of great importance that everything else depends on

piedra angular, pilar
In most countries, the family unit is still the cornerstone of society.

(Translation of “cornerstone” from the Cambridge English-Spanish Dictionary © Cambridge University Press)