What is "brahmarshi"

In Hinduism, a Brahmarshi ( Sanskrit , a tatpurusha compound of and ) is a member of the highest class of Rishis ("seers" or "sages"), especially those credited with the composition of the hymns collected in the Rigveda. A Brahmarshi is a sage who has understood the meaning of Brahman or has attained the highest divine knowledge Brahmajnana.