There are multiple definitions - click on the translation that matches your context.

koncepcja wspaniałej izolacji

rzeczownik

full

splendid isolation

phrase

Definitions of splendid isolation

a phrase used to emphasize the fact that something is separate and not connected to other things

Private schools should end their splendid isolation and work with state schools.

a phrase used to describe a state's policy of refusing to cooperate with other countries in forming treaties, working together, or establishing common rules, regulations or laws etc

We lived in splendid isolation for centuries, protected only by the Navy.