You're welcome! Sorry it was quite complicated. (Just a quick correction: "Thank you so much for your excellent answer").

Thank you so much about your excellent answer

Generally speaking, "solicitor" is UK English, whereas "lawyer" is US English. This reflects the fact that these countries have different legal systems. 

In the US, a person who has studied law and practises law is called a "lawyer" (or "attorney"), which is a very general term, and the definition of this varies from country to country.

In the UK however, there are two different types of "lawyers"; solicitors and barristers (the US equivalent of barrister is "advocate"). Solicitors are of a higher rank than barristers. Solicitors are attorneys, which means that they can act in the place of their client for legal purposes (as in signing contracts) and may conduct litigation on their behalf. A barrister is not an attorney and is usually forbidden, either by law or professional rules or both, from conducting litigation. This means that, while the barrister speaks on the client's behalf in court, he or she can do so only when instructed by a solicitor.

beside the words above,attorney included additionally.