Lexical Definition

‎κιβωτός‎ kibōtós (kib-o-tos') ark: covenant ^G:N-F
of uncertain derivation

ark.

• a box, i.e. the sacred ark and that of Noah

Abbott-Smith

κιβωτός, -οῦ, ἡ, [in LXX: Ge 6-9* (תֵּבָה), elsewhere, very freq., as Ex 25:9* (10*), for אָרוֹן;]
a wooden box or chest: of Noah's ark, Mt 24:38, Lk 17:27, He 11:7, I Pe 3:20; of the ark of the covenant, He 9:4, Re 11:19.†

Abbott-Smith References

Liddell-Scott-Jones

κιβωτός, ἡ,

box, chest, coffer, [Refs 5th c.BC+]; Noah's ark, [LXX]; the ark of [LXX+2nd c.AD+]; πέπτωκεν εἰς κ. has been deposited in the archives, [Refs 3rd c.BC+], etc.; opposed to κίστη (which see). (Perh. a variant in [Refs 8th c.BC+] cites κίβος as the radical form.)

_{LSJ Scripture Refs: LXX.Gen.6.14 ☩ LXX.Exod.25.9*}