Brahmin (ब्राह्मणः)

Brahmana (Samskrit:ब्राह्मणः), in this usage the word is usually rendered in English as "Brahmin" here refers to one who belongs to the first varna namely Brahmana. He is governed by Brahmana dharmas. One who has the following occupations are Brahmanas according to Mahabharata

वृत्त्यर्थं ब्राह्मणानां वै शृणु धर्मान्सनातनान्॥ 13-141-66 (Maha. Anush. 13.141.66)

यजनं याजनं चैव तथा दानप्रतिग्रहौ। अध्यापनं चाध्ययनं षट्कर्मा धर्मभाग्द्विजः॥ 13-141-67 (Maha. Anush. 13.141.67)

Shabdakalpadruma reference