Bhuh is the earthly plane. Above it in ascending order are Bhuvah, Svah, Mahar, Jana, Tapa and Satya (also known as Brahma-loka);
Brahmin is one who has either realised his oneness with Brahman, the Absolute, or one who has dedicted his life to the pursuit of that realization. Such selfless people are the enlightened thinkers who provide society with a healthy understanding of life. They give guidance to all sections of society, including the political leadership. A Brahmin can also mean a brilliant intellectual who is using his talents to selflessly serve society.