LSJ
ον, Vett.Val. 242.26, also ος, α, ον ib. 14, Hdn. 7.5.3; (< σέβας) : — reverend, venerable, august, Plu. 2.764b, Luc. Am. 19, etc. ; τὸ σ. Orph. H. 27.10; τὸ πρὸς θεοὺς σ.
reverence for…, Hdn. 2.10.2. Adv. -ίως Ptol.Ascal. p. 395 H. as epith. of the Roman Emperor, = Σεβαστός, Augustus, SIG 834.6 (Sup., ii AD), Hdn. 2.3.3 (v.l. σεβαστόν) οἱ Σεβασμιώτατοι Καίσαρες CPR 37.15 (iii AD); σ. ὅρκος, oath taken by the genius of the Emperor, PSI 1.40.19 (ii AD), etc. Σεβάσμια, τά, games in honour of the Emperor, IG 3.129 (iii AD, in form Σεβάσμεια, but perh. rather Σεβασμεῖα, contr. from ΄Σεβασμιεῖα); also on coins, Head Hist. Num. 2717, 784.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)