5598. O
Lexical Summary
O: Omega

Original Word:
Part of Speech: Indeclinable Letter (Noun)
Transliteration: O
Pronunciation: ō
Phonetic Spelling: (o'-meg-ah)
KJV: Omega
NASB: Omega
Word Origin: [Greek letter]

1. the last letter of the Greek alphabet
2. (figuratively) the finality

Strong's Exhaustive Concordance
Omega.

The last letter of the Greek alphabet, i.e. (figuratively) the finality -- Omega.

HELPS Word-studies

5598 Ō (long ō, originally formed by pronouncing two short o's/omikrons together, cf. Zodhiates, Dictionary) – the final letter of the Greek alphabet; (figuratively) God's infinity (endlessness), in contrast to alpha – the first letter of the Greek alphabet which represents the Lord as the unoriginated originator of all life and all that is eternal.

In the NT, 5598 ("Ōmega") is always used of the glorified Christ (Rev 1:8, 21;6, 22:13), referring to His absolute limitlessness to meet all the needs of finite (limited) people.

[Ōmega is the twenty-fourth (final) letter of the Greek alphabet, which begins with 1 /A ("alpha").]

NAS Exhaustive Concordance
Word Origin
i.e. ómega
Definition
the last letter of the Gr. alphabet
NASB Translation
Omega (3).

Thayer's Greek Lexicon
STRONGS NT 5598: Ω

Ω, Omega: omega, the last (24th) letter of the Greek alphabet: ἐγώ εἰμί τό Ω (WH Ω, L , T ), equivalent to τό τέλος, i. e. the last (see Alfa, Α, , ἄλφα (and B. D. (especially American edition) under the word and article 'Alpha', also article Α and Ω by Piper in Herzog (cf. Schaff-Herzog), and by Tyrwhitt in Dict. of Chris. Antiq.)), Revelation 1:8, 11 Rec.; . (On the interchange of omega and omicron in manuscripts see Scrivener, Plain Introduction etc., p. 627; 'Six Lectures' etc., p. 176; WH. Introductory § 404; cf. especially Meisterhans, Gram. d. Attic Inschr., p. 10.)

Topical Lexicon
Occurrences

Revelation 1:8; 1:11; 21:6; 22:13.

All four verses form part of the self-declaration “I am the Alpha and the Ω,” a title applied to the Lord God (1:8) and to Jesus Christ (1:11; 21:6; 22:13), thus uniting Father and Son in one divine identity.

Literary Frame in Revelation

The word appears near the beginning (1:8–11) and the end (21:6; 22:13) of Revelation, bracketing the whole prophecy and functioning as a literary inclusio. This announces that the same Sovereign who initiates history will also consummate it, assuring readers that every vision in between is under His absolute control.

Theological Themes

1. Divine Eternity

Revelation 1:8: “I am the Alpha and the Omega… who is and was and is to come—the Almighty.” The title links God’s timeless self-identification to Christ, echoing Exodus 3:14 and Isaiah 41:4; 44:6; 48:12 (“I am the first and I am the last”).

2. Sovereign Completion

Revelation 21:6: “It is done! I am the Alpha and the Omega, the Beginning and the End.” Ω signals consummation: creation, redemption, and judgment reach their goal in Christ’s finished work (compare John 19:30).

3. Christological Equality with the Father

The same appellation used for “the Lord God” (1:8) is repeated by Jesus (22:13), underlining His full deity. The unity of titles supports the New Testament testimony that the Son shares the Father’s essence (John 10:30; Colossians 2:9).

4. Eschatological Certainty

Ω guarantees that prophecy is not open-ended. The new heaven and new earth (Revelation 21–22) are secured by the One who both begins and ends history.

Historical and Liturgical Use

• Early Christians inscribed Α and Ω on tombs, lamps, and mosaics as a shorthand confession of faith in the risen Christ’s lordship over life and death.
• Patristic writers (e.g., Ignatius, Irenaeus) cited the title in defending the deity of Christ against Gnostic and Arian claims.
• Traditional church art places the letters beside the cross or inside Christ’s halo, portraying Him as Creator and Consummator.

Pastoral and Ministry Applications

• Assurance in Persecution

Revelation was written to embattled churches. Proclaiming Christ as Ω encourages believers facing opposition that their suffering has an appointed limit and purpose (Revelation 2:10).

• Motivation for Holiness

Knowing that the Lord who judges is also the Ω who completes salvation calls the church to faithfulness (Revelation 22:12–14).

• Evangelistic Hope

Ω grounds the universal invitation of Revelation 22:17; the One who ends history also offers life-giving water now.

Related Biblical Titles

“First and Last” (Revelation 1:17), “Beginning and End” (Revelation 21:6), and “Author and Perfecter of our faith” (Hebrews 12:2) parallel the Ω motif, each stressing Christ’s total mastery over origin, process, and goal.

Summary

Strong’s 5598 serves as far more than a Greek letter. In Revelation it operates as a Christological and eschatological title that roots all of redemptive history in the person of Jesus Christ, offers unwavering hope to the church, and calls every reader to worship the One who is, indeed, both the first word and the final one.

Forms and Transliterations
Ω Ὦ o ô Ō Ō̂ omega Ōmega
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Revelation 1:8 N
GRK: καὶ τὸ λέγει Κύριος
NAS: the Alpha and the Omega, says
KJV: Alpha and Omega, the beginning and
INT: and the Omega says Lord

Revelation 1:11 Noun
GRK: καὶ τὸ Ω Ὃ πρῶτος
KJV: Alpha and Omega, the first and
INT: and the Omega the first

Revelation 21:6 N
GRK: καὶ τὸ ἡ ἀρχὴ
NAS: I am the Alpha and the Omega, the beginning
KJV: Alpha and Omega, the beginning and
INT: and the Omega the beginning

Revelation 22:13 N
GRK: καὶ τὸ ὁ πρῶτος
NAS: I am the Alpha and the Omega, the first
KJV: Alpha and Omega, the beginning and
INT: and the Omega the first

Strong's Greek 5598
4 Occurrences


Ὦ — 4 Occ.

5597
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