Lexical Definition

‎ἄριστον‎ áriston (ar'-is-ton) early meal G:N-N
apparently neuter of a superlative from the same as ‎ἄῤῥην‎

dinner.

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ἄριστόν dinner Matt.22.4
ἄριστον a dinner Luke.14.12
ἀρίστου dinner Luke.11.38
αρίστου of dinner LXX.2Sam.24.15

Abbott-Smith

ἄριστον, -ου, τό, [in LXX: III Ki 3:1 (לֶחֶם), To 2:1, 4, al.;]
1. 1, prop., breakfast.
2. In late Gk. = cl. δεῖτνον, dinner: Mt 22:4, Lk 11:38 14:12.†

Abbott-Smith References

Book Refs
1 Kings 3:1
Matthew 22:4
Luke 11:38 · 14:12

Liddell-Scott-Jones

ἄριστον, τό,

morning meal, breakfast, twice in [Refs 8th c.BC+]: later, breakfast was called ἀκράτισμα, and ἄριστον was the midday meal, our luncheon,[Refs 5th c.BC+]; . αἱρεῖσθαι, ποιεῖσθαι, [Refs 5th c.BC+]. [; contraction from (y) ερι-στον, cf. Gothic air, OHG. ēr 'early', Avest. ayar[schwa] 'day'; also (y) ερ- in ἦρι, ἠέριο; -στο- from -d-to-, root ed- 'eat'.]