Lexical Definition

‎ἐθνικός‎ ethnikós (eth-nee-kos') Gentile-like G:A
from ‎ἔθνος‎

heathen (man).

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ἐθνικῶν Gentile 3John.1.7
ἐθνικὸσ pagan Matt.18.17
ἐθνικοὶ Gentiles Matt.5.47
ἐθνικοί pagans Matt.6.7

Abbott-Smith

**† ἐθνικός, -ή, -όν, (< ἔθνος), [in Al.: Le 21:7 * ;]

1. national (Polyb.).
2. foreign (gramm.); in NT, as subst., ὁ ἐ., the Gentile (the adj. "describes character rather than mere position"; cf. ἔθνος, and v. Cremer, 228): Mt 5:47 6:7 18:17, III Jo 7.†

Abbott-Smith References

Book Refs
Leviticus 21:7
Matthew 5:47 · 6:7 · 18:17
3 John 1:7

Liddell-Scott-Jones

ἐθνικός-ικός, , όν,

national, συστάσεις [Refs 5th c.BC+]

__II foreign, gentile, [ἐθνικόςικῇ.. ἐν σοφία “epigram Gr.” 430.6. ">NT] adverb -κῶς, opposed to Ἰουδαϊκῶς[NT]
__II.b in the Roman Empire, provincial, Codex Just.[Refs]
__III Grammars, indicating nationality, [Refs 2nd c.BC+] adverb -κῶς, παραχθέν[Refs 1st c.BC+]
__III.2 dialectal, ἔθος [Refs 2nd c.AD+]
__IV ἐθνικόςικός, , tax-collector, [Refs 6th c.AD+]

LSJ Scripture Refs: Matt.5.47Gal.2.14