Wiktionary
n. An adherent of the Brahmoism religion.
Wikipedia
A Brahmo is either an adherent of Brahmoism to the exclusion of all other religions, or a person with at least one Brahmo parent or guardian and who has never denied his faith. This definition has evolved from legal acts and juristic decree since previously "the word Brahmo did not admit of a clear definition."
The 2001 Census of India counted only 177 Brahmo in India, but the number of "followers" (Brahmo Samajists) who constitute the wider community Brahmo Samaj ("assembly for Brahmo worship") is significantly higher, and reliably estimated as about 20,000 Sadharan Brahmo Samajists, 10,000 other Brahmo denominations and 8,000,000 declared Adi Dharmists. Since the Brahmo Samaj does not sanction caste, many low caste Brahmo converts in Upper India benefiting under India's social development policies prefer to declare themselves as Adi Dharm, a practice fostered by the Brahmo Samaj of North India since the 1931 census. A state-wise study by the Brahmo Conference Organisation has tabulated 7.83 million Adi Dharm declarants in the 2001 Census.
A recent publication describes the disproportionate influence of Brahmos on India's development post-19th Century as unparalleled in recent times,
Usage examples of "brahmo".
There is scarcely a religion that has not its Bahaism, its Modernists, its Brahmo Somaj, its "religion without theology," its attempts to escape from old forms and hampering associations to that living and world-wide spiritual reality upon which the human mind almost instinctively insists.