Meaning of revelator in English:
1A person who or thing which discloses or reveals something; the maker of a revelation; a revealer.
2Chiefly with capital initial. (An epithet of) St John of Patmos, as the author of the book of Revelation.
3(A title of) the president of the Church of Jesus Christ of Latter-day Saints (Mormons).
Late Middle English; earliest use found in Reginald Pecock (c1392–?1459), bishop of Chichester and religious author. From post-classical Latin revelator person who reveals (early 3rd cent. in Tertullian) from classical Latin revēlāt-, past participial stem of revēlāre + -or.