In Judeo-Christian belief, the archangel of Annunciation, Resurrection, Mercy, Revelation and Death. Also known in Hebrew orthography as Gabri-el. The angel who gave the Annunciation of Christ's birth to the Virgin Mary, and also the angel responsible for blowing the Trump on Judgment Day.
In Islamic belief, the angel who dictated the Q'uran to Muhammad, and the angel of Truth.
Some theological thought holds that Gabriel is (as much as angels can be) female, the only one among a male or androgynous Host. The name is derived from the Sumerian root GBR, governor.