Abbott-Smith Manual Greek Lexicon
ἐθνικός (G1482)
5 **† ἐθνικός , -ή, -όν , ( ἔθνος ), [in Al.: Le 21:7 * ;] national (Polyb.). 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 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain