What does ADOPT mean?

verb

1. choose and follow; as of theories, ideas, policies, strategies or plans“She followed the feminist movement”
2. take up and practice as one's own
3. take on titles, offices, duties, responsibilities“When will the new President assume office?”
4. take on a certain form, attribute, or aspect“His voice took on a sad tone”
5. take into one's family“They adopted two children from Nicaragua”
6. put into dramatic form“adopt a book for a screenplay”
7. take up the cause, ideology, practice, method, of someone and use it as one's own“She embraced Catholicism”