Lexical Definition

‎χρῖσμα‎ chrîsma (khris'-mah) anointing ^G:N-N
from ‎χρίω‎

anointing, unction.

• an unguent or smearing, i.e. (figuratively) the special endowment ("chrism") of the Holy Spirit

Abbott-Smith

χρίσμα (T, χρῖσμα, as in cl.; v. Tdf., Pr., 102; Bl., § 4, 2), -τος, το (< χρίω),
later form of χρῖμα (Æsch., al.), [in LXX for מִשְׁחָה and cogn. forms (Ex 29:7, al.) ;]
an anointing, unction (the result of the action χρίειν; ICC, in l.; but cf. Westc., in l, for the view that the oil, not the act, is meant): I Jo 2:20, 27.†

Abbott-Smith References

Liddell-Scott-Jones

χρῖσμα ατος, τό,

(χρίω) later form for χρῖμα (which see), found in codices of [Refs 5th c.BC+]

__II anointing, unction, [LXX+2nd c.AD+]
__II.2 in “NT” of spiritual grace, χρῖσμα ἔχετε ἀπὸ τοῦ ἁγίου [NT]
__III coating of wall, plaster, [Refs 1st c.BC+]

_{LSJ Scripture Refs: LXX.Exod.29.7 ☩ 1John.2.20}