1.
You can describe someone or something as self-contained when they are complete and separate and do not need help or resources from outside.
He seems completely self-contained and he doesn’t miss you when you’re not there...
...self-contained economic blocs.
ADJ
2.
Self-contained accommodation such as a flat has all its own facilities, so that a person living there does not have to share rooms such as a kitchen or bathroom with other people.
ADJ : usu ADJ n