Lexical Definition

‎μετάθεσις‎ metáthesis (met-ath'-es-is) removal/change ^G:N-F
from ‎μετατίθημι‎

change, removing, translation.

• transposition, i.e. transferral (to heaven), disestablishment (of a law)

Abbott-Smith

** μετά-θεσις, -εως, ἡ (< μετατίθημι), [in LXX: II Mac 11:24*;]
1. change of position, removal: He 11:5.
2. change, as of that which has been established: He 7:12 12:27.†

Abbott-Smith References

Liddell-Scott-Jones

μετάθεσις, εως, ἡ,

(μετατίθημι) change of position, transposition, [Refs 4th c.BC+]; τοῦ ἐμβρύου [Refs 2nd c.AD+]; couching of a cataract, [Refs 2nd c.AD+]

__2 generally, change, θεὸς οὐδεμίαν ἐπιδεχόμενος μ. [NT+5th c.BC+]; especially change of sides or opinions, ἐπὶ τὸ βέλτιον [Refs 2nd c.BC+] (hence, amendment, τῶν ἡμαρτημένων [Refs 2nd c.BC+]; going over, πρός τινα [Refs]
__3 exchange, barter, [Refs]
__4 Grammars, change of a letter, [Refs 2nd c.AD+]; also, metathesis, transposition of letters, as κραδίη for καρδία, [Refs 1st c.BC+]
__5 plagiarism, opposed to μίμησις, [Refs 4th c.BC+]
__II power or right of changing sides, [Refs 5th c.BC+]

_{LSJ Scripture Refs: Heb.7.12}