What is the meaning of Brahmana?

The brahmin varna in Hinduism. (Plural: brahmana.)

A brahmin; a member of the brahmana (sense 1).

A prose text that explains aspects of the Vedas.

a Brahmin, a man belonging to the 1st of the 3 twice-born classes and of the 4 original divisions of the Hindu body (generally a priest, but often in the present day a layman engaged in non-priestly occupations although the name is strictly only applicable to one who knows and repeats the veda).

Source: wiktionary.org