What is the meaning of Ta'arrub Ba'd al-Hijra which is one of the major sins?

Answer

Some jurists have said that during our time, it applies to residing in countries that may cause the loss of faith. It means the migration of a person from a country -where it is possible for him to learn the obligatory religious teachings and laws, and where it is possible for him to fulfill his obligations and refrain from what is forbidden- to a country where this possibility does not exist fully or partially.