Lexical Definition

‎ἁγιασμός‎ hagiasmós (hag-ee-as-mos') holiness ^G:N-M
from ‎ἁγιάζω‎

holiness, sanctification.

• properly, purification, i.e. (the state) purity
• concretely (by Hebraism) a purifier

Abbott-Smith

† ἁγιασμός, -οῦ, ὁ (< ἁγιάζω), [in LXX: Ez 45:4 (מִקְדָּשׁ), Si 7:31, etc.;]
as an active verbal noun in -μός, it signifies properly the process τὸ ἁγιάζειν, rather than the resultant state, ἁγιωσύνη, hence,
1. consecration;
2. sanctification: so strictly in Ro 6:19, 22 (but v. Meyer), I Co 1:30, I Th 4:3, 7, II Th 2:13, He 12:14, I Pe 1:2. Elsewhere it perhaps (Ellic.; but v. Milligan, Th., 48) inclines to the resultant state: I Th 4:4, I Ti 2:15 (Cremer, 55, 602).†

Abbott-Smith References

Liddell-Scott-Jones

ἁγιασμός-ασμός, ον, ὁ,

consecration, sanctification, [LXX+NT]

_{LSJ Scripture Refs: LXX.Judg.17.3 ☩ 1Thess.4.7}