Lexical Definition

‎ἄμωμος‎ ámōmos (am'-o-mos) blameless ^G:A
from ‎Α‎ (as a negative particle) and ‎μῶμος‎

without blame (blemish, fault, spot), faultless, unblamable.

• unblemished (literally or figuratively)

Abbott-Smith

ἄ-μωμος, -ον (< μῶμος, q.v.), [in LXX chiefly for תָּמִים];
of sacrificial victims, without blemish: of Christ, He 9:14, I Pe 1:19; ethically, unblemished, faultless: Eph 1:4 5:27, Phl 2:15, Col 1:22, Ju 24, Re 14:5 (Cremer, 425, 788; MM, VGT, s.v.).†
SYN.: ἀμίαντος, ἄσπιλος.

Abbott-Smith References

Liddell-Scott-Jones

ἄμωμος, ον,

blameless, [Refs 7th c.BC+]; without blemish, εἶδος ἄ.[Refs 8th c.BC+]

__2 unblemished, of victims, etc., [LXX+NT+1st c.AD+]
__3 unimpaired, perfect, ὑγίεια[Refs 4th c.BC+]

_{LSJ Scripture Refs: LXX.Exod.29.1 ☩ 1Pet.1.19}