Omega
OMEGA (ō-mē'ga). Literally, large “O,” the last letter of the Greek alphabet, long “o.” In three contexts (Rev.1.8; Rev.21.6; Rev.22.13) it is used as a symbol of inclusiveness: “...the Alpha and the Omega, the First and the Last, the Beginning and the End.”
OMEGA ō mĕg’ ə, ō me’ gə (ὠ̂). The last letter of the Gr. alphabet. It is sometimes used with its opposite, Alpha, to indicate the beginning and the end (Rev 1:8; 21:6; 22:13).