[1] The word Brahmistha is found in the Vedic literatures.
[2] A Brahmin who has attained the greatest knowledge of Vedas is called as Brahmistha.
[3][4] The word Brahmistha is also defined as "the best knower of Brahman".
[5][6] Brahmistha is the superlative degree form of the word Brāhmaṇa.
[1][7] In the philosophical text Brihadaranyaka Upanishad, the word Brahmistha was used by the King Janaka of Mithila at his court during the occasion of the Bahudakshina Yajna to denote the greatest scholar of Vedas.