Lexical Definition

‎σεβαστός‎ sebastós (seb-as-tos') Augustan ^G:A
from ‎σεβάζομαι‎

Augustus(-').

• venerable (august), i.e. (as noun) a title of the Roman Emperor, or (as adjective) imperial

Abbott-Smith

* σεβαστός, -ή, -όν (σεβάζομαι)
1. reverend, august.
2. In late writers, with reference to the Roman Imperial name;
(a) ὁ Σ., Augustus, i.e. the Roman Emperor: Ac 25:21, 25;
(b) Augustan: σπείρα σ., Ac 27:1 (See further, Deiss., BS, 218.) †

Abbott-Smith References

Liddell-Scott-Jones

spelling of: Αὐγοῦστος

σεβαστός, ή, όν,

venerable, reverend, august, πρᾶγμα [Refs 1st c.BC+]; θεοί, probably of deified Emperors, [Refs 1st c.AD+]

__II = Latin [NT+1st c.BC+]; ἐπὶ τοῦ πρώτου Σ. in the time of the first [Refs]; feminine Σεβαστή, = [Refs 1st c.AD+]; joined with Αὔγουστος, -ούστη, [Refs]
__II.2 name of month, “Augustus”, in Egyptian calendars,= Thoth[Refs]; in Phrygia and elsewhere, [Refs]
__II.3 σεβαστή, ἡ (i.e. ἡμέρα), the Emperor's day, the day on which his birthday or accession day was celebrated every month, [Refs 1st c.BC+]
__II.4 Σεβαστά, τά,= Σεβαστεῖα [Refs 1st c.AD+]

_{LSJ Scripture Refs: Acts.25.21}