Lexical Definition

‎λευκός‎ leukós (lyoo-kos') white G:A
from ("light")

white.

Usage: 17 forms in 54 verses
Form Translated As     In Verse(s)
λευκὸσ white Luke.9.29Rev.6.2
λευκὸν white Matt.28.3Rev.1.14Rev.19.14Rev.20.11
λευκὴν white Matt.5.36Mark.16.5
λευκὴ white Rev.6.11
λευκὰσ white Rev.7.9
λευκὰ white Matt.17.2Mark.9.3Rev.3.18
λευκόσ white LXX.Song.5.10Rev.19.11
λευκόν white LXX.Gen.30.37LXX.Exod.16.14LXX.Exod.16.31LXX.Lev.13.13LXX.Lev.13.16LXX.Lev.13.17LXX.Lev.13.24LXX.Dan.7.9
λευκοῖσ white John.20.12Rev.3.4Rev.3.5Rev.4.4Rev.19.14
λευκοί white LXX.Gen.49.12LXX.Zech.1.8LXX.Zech.6.3LXX.Zech.6.6
λευκαῖσ white Acts.1.10
λευκαὶ white Rev.1.14
λευκαί white John.4.35
λευκήν white LXX.Lev.13.4LXX.Lev.13.10LXX.Lev.13.20LXX.Lev.13.25Rev.2.17
λευκή a white LXX.Lev.13.10LXX.Lev.13.19LXX.Lev.13.26LXX.Lev.13.42
should be white LXX.Lev.13.4
white LXX.Lev.13.3LXX.Lev.13.21LXX.Lev.13.43Rev.14.14
λευκάσ white Rev.7.13
λευκά white LXX.Gen.30.37LXX.Gen.31.8LXX.Gen.31.8LXX.Eccl.9.8

Abbott-Smith

λευκός, ή, -όν, [in LXX chiefly for לָבָן;]
1. bright, brilliant: of clothing, Mt 17:2, Mk 9:3 16:5, Lk 9:29, Ac 1:10, Re 3:5 4:4 6:11 7:9, 13 19:14 (cf. Ec 9:8); ὡς χιών, Mt 28:3; ἐν λ. (sc. ἱματίοις), Jo 20:12, Re 3:4; θρόνος, Re 20:11.
2. white: Mt 5:36, Re 1:14 2:17 4:4 6:2 14:14 19:11; fig., of garments, Re 3:18; of ripened grain, Jo 4:35.†

Abbott-Smith References

Book Refs
Ecclesiastes 9:8
Matthew 5:36 · 17:2 · 28:3
Mark 9:3 · 16:5
Luke 9:29
John 4:35 · 20:12
Acts 1:10
Revelation 1:14 · 2:17 · 3:4 · 3:5 · 3:18 · 4:4 · 6:2 · 6:11 · 7:9 · 7:13 · 14:14 · 19:11 · 19:14 · 20:11

Liddell-Scott-Jones

λευκός, , όν,

light, bright, clear (opposed to μέλας in all senses), αἴγλη [Refs 8th c.BC+]; λευκὸν (variant{λαμπρόν}).. ἠέλιος ὥς [Refs 8th c.BC+]; of metallic surfaces, λέβης [Refs 8th c.BC+]; λ. γαλήνη a glassy calm, [Refs 8th c.BC+]; of water, clear, limpid, [Refs 8th c.BC+]

__2 metaphorically, clear, distinct, of the voice, [Refs 4th c.BC+]: in literary sense, clear, λ. στίχος [Refs 1st c.AD+], when a rogue was detected, [Refs] adverb -κῶς, πάντα φαίνειν, of Hermes, [Refs 1st c.AD+]: comparative -ότερον, διαλεχθῆναι [Refs 3rd c.AD+]
__II of colour, white, frequently in [Refs 8th c.BC+], varying from the pure white of snow ([ἵπποι] -ότεροι χιόνος [Refs 8th c.BC+] to the grey of dust (λευκοὶ ἐγένοντο κονισάλῳ [Refs]; λ. ἅρμα, ={λεύκιππον}, [Refs 5th c.BC+]; of the white horses used by tyrants, λ. ζεῦγος [Refs 4th c.BC+], compare λεύκιππο; λ. λίθος marble, [Refs 3rd c.BC+], etc., compare λευκόλιθο; λευκῷ[ν]λίθῳ λ. στάθμη a white line on a white stone, proverbial of explanations which do not explain, [Refs 5th c.BC+]; λ. ῥίζα white root (= τοῦ δρακοντίου, accusative to [Refs 5th c.BC+]; frequently of white or grey hair, λ. κάρη [Refs 7th c.BC+]
__II.b of the human skin, white, fair, sometimes as a sign of youth and beauty, χρώς, πήχεε, [Refs 8th c.BC+]; λ. παρειά, παρηΐς, [Refs 5th c.BC+]; frequently with the notion of bare, κῶλον, πούς, [Refs]; compare λευκόπους.
__II.c of persons, white-skinned, [Refs 5th c.BC+]: hence, weakly, womanish, [Refs 5th c.BC+]; compare λευκόπρωκτος, λευκόχρως.
__II.d λευκαὶ φρένες in [Refs 5th c.BC+], frantic, passionate (compare λευκῶν πραπίδων· κακῶν φρενῶν, [Refs]
__II.2 λ. χρυσός, pale gold, i.e. gold alloyed with silver (probably the same as ἤλεκτρον), opposed to ἄπεφθος χρυσός, [Refs 5th c.BC+]
__II.3 metaphorically, bright, fortunate, happy, λευκὸν ἦμαρ νυκτὸς ἐκ μελαγχίμου [Refs 4th c.BC+]; a joyful day or holiday, [Refs 3rd c.BC+]; λ. ἡμέρα a happy day, [Refs 5th c.BC+]; λ. ψῆφος the vote of acquittal, [Refs 2nd c.AD+]
__III λεύκη, , leuko/n, τό, as substantive, (see entry). (Cogn. with Latin lux, etc.)