Alpha (ăl'phah). The first letter of the Greek alphabet, corresponding to Aleph, the first Hebrew letter. These letters were used as numerals. Alpha therefore denotes one, the first. And, as Omega is the last Greek letter, our Lord calls himself Alpha and Omega, the first and the last, implying his divine eternity. Revelation 1:8; Revelation 1:11; Revelation 21:6; Revelation 22:13; comp. Isaiah 44:6.