1. 自给的;独立自足的
You can describe someone or something as self-contained when they are complete and separate and do not need help or resources from outside.
2. (住宿场所)设施齐全的，独门独户的
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.
1. constituting a complete and independent unit in and of itself
e.g. the university is like a self-contained city with shops and all amenities
2. in full control of your faculties
e.g. the witness remained collected throughout the cross-examination
perfectly poised and sure of himself
more self-contained and more dependable than many of the early frontiersmen
strong and self-possessed in the face of trouble
Synonym: collectedequanimouspoisedself-collectedself-possessed