I act in the public service, render service, minister, in the widest sense, of some special public religious service, but also of the service of priests and Levites.
Strong's:
λειτουργέω
to be a public servant, i.e. (by analogy) to perform religious or charitable functions (worship, obey, relieve) Derivation: from G3011;
λειτουργέω, -ῶ (< λειτουργός), [in LXX chiefly for שָׁרַת pi., also for עָבַד, צָבָא, etc. ;] __1. in cl., at Athens, to supply public offices at one's own cost, render public service to the State, hence, generally, __2. to serve the State, do a service, serve (of service to the Gods, Diod., i, 21): of the official service of priests and Levites (Refs Exo.29:30, Num.16:9, Sir.4:14, 1Ma.10:42, al.; cf. Deiss., BS, 140 f.), Heb.10:11; of Christians: with dative of person(s) before ἐν, Rom.15:27 (cf. Sir.10:25); τ. κυρίῳ, Act.13:2.† SYN.: λατρεύω (which see), prop., to serve for hire, LXX (as sometimes in cl.), always of service to the deity on the part of both priests and people (Refs Exo.4:3, Deu.10:12, and similarly in NT). λειτουργέω "is the fulfilment of an office: it has a definite representative character, and corresponds with a function to be discharged". It is therefore used of serving in an office or ministry: in LXX always of priests and Levites, in NT, with its cognates (Refs Rom.13:6 15:27, are not really exceptions), of services rendered either to God or man by apostles, prophets, teachers, and other officers of the church (cf. Tr., Syn., § xxxv; ICC on Rom.1:9; Westc., He., 232 ff.) (AS)
Thayer:
1) to serve the state at one's own cost 1a) to assume an office which must be administered at one's own expense 1b) to discharge a public office at one's own cost 1c) to render public service to the state 2) to do a service, perform a work 2a) of priests and Levites who were busied with the sacred rites in the tabernacle or the temple 2b) of Christians serving Christ, whether by prayer, or by instructing others concerning the way of salvation, or in some other way 2c) of those who aid others with their resources, and relieve their poverty
λειτουργέω
leitourgeō
li-toorg-eh'-o
From G3011; to be a publicservant, that is, (by analogy) to perform religious or charitable functions (worship, obey, relieve)
λειτουργός
leitourgos
li-toorg-os'
From a derivative of G2992 and G2041; a publicservant, that is, a functionary in the Temple or Gospel, or (generally) a worshipper (of God) or benefactor (of man)