Lexical Definition

‎ἱερουργέω‎ hierourgéō (hee-er-oorg-eh'-o) to minister ^G:V
from a compound of ‎ἱερόν‎ and the base of ‎ἔργον‎

minister.

• to be a temple-worker, i.e. officiate as a priest (figuratively)

Abbott-Smith

**† ἱερουργέω, -ῶ (< ἱερουργός, a sacrificing priest) [in LXX: IV Mac 7:3 R (cf. -γία, IV Mac 3:30 א R)*;]
to perform sacred rites; c. acc., to minister in priestly service (minister in sacrifice, R, mg.), τὸ εὐαγγέλιον, Ro 15:16.†

Abbott-Smith References

Liddell-Scott-Jones

ἱερουργέω-έω,

perform sacred rites, [Refs 1st c.AD+]

__II with accusative, ἱ. τὴν κλίνην, Latin lectisternium facere, [Refs]; ἱ. ζῷα sacrifice them, gloss on{σφάξαι}, [Refs 1st c.AD+] V.; ἱ. τὸ εὐαγγέλιον minister the gospel, [NT]; τὸν νόμον variant in [LXX]:—middle, ἱερουργέωίας ἱερουργέωεῖσθαι [Refs 1st c.AD+] —passive, τὰ ἱερουργέωηθέντα victims offered, [Refs 2nd c.AD+]; -ούμεναι τελεταί celebrated, [Refs 4th c.AD+]; ἱερουργέωούμενοι βωμοί consecrated, [Refs 3rd c.AD+]

_{LSJ Scripture Refs: Rom.15.16}