For the Bajoran prophets, please see Prophet.
A prophet was someone who spoke or wrote prophecies.
In the song "Abdul Abulbul Amir", the title character was described as a "son(s) of the prophet". (TNG: "Brothers")
In 2367, the impostor masquerading as Ardra told Acost Jared and the other Ventaxians not to "talk like some ancient prophet around me, with thees and thous and most powerful ones". (TNG: "Devil's Due")
In 2377, upon The Doctor's expression of disinterest in being worshipped by other holograms as the central focus of a new religion, Iden told him, "Prophets are chosen, Doctor. It's a blessing and a burden." (VOY: "Flesh and Blood")