STEP Greek Lexicon: ω, Ὦμέγα

Ω, ω, ὦ μέγα (cf. ὂ μικρόν),

omega, ô, the twenty-fourth and last letter. As a numeral, ω᾽ = 800, ω, = 800,000. As a symbol of the last (= τὸ τέλος), τὸ Ὦ (Rec. Ω, L, ὦ, T, ω), the Omega: Rev.1:8 21:6 22:13 (cf. Ἄλφα).†

(AS)