to separate something from other things with which it is connected or mixed:
A high wall isolated the house from the rest of the village.
They tried to isolate (= find) the cause of the problem.
specialized Virus particles were eventually isolated from the tissue.
to keep a person or animal separate from other people or animals by putting them in a different place:
He was isolated from all the other prisoners.
to put a person, country, or organization in a situation where they are seen as being separate :
This policy will isolate minority groups and prevent integration.