λειτουργέω, participle λειτουργῶν; 1 aorist infinitive λειτουργῆσαι; (from λειτουργός, which see);

1. in Attic, especially the orators, "to serve the state at one’s own cost; to assume an office which must be administered at one’s own expense; to discharge a public office at one’s own cost; to render public service to the state" (cf. Melanchthon in Apology, Confessions, Augustine, p. 270f (Corpus Reformat. edition Bindseil (post Bretschn.) vol. xxvli., p. 623, and F. Francke, Conf. Luth., Part i., p. 271 note (Lipsius 1846)); Wolf, Demosthenes, Lept., p. 85ff; Böckh, Athen. Staatshaush. i., p. 480ff; Lübker, Reallex. des class. Alterth. (or Smith, Dict. of Greek and Rom. Antiq.) under the word λειτουργία).

2. universally, to do service, to perform a work; Vulg.ministro (A. V. to minister);

a. of the priests and Levites who were busied with the sacred rites in the tabernacle or the temple (so the Sept. often for ùÅÑøÅú; as Num 18:2; Exo 28:31; Exo 28:39; Exo 29:30; Joe 1:9, etc.; several times for òÈáÇã, Num 4:37; Num 4:39; Num 16:9; Num 18:6 f; add, Sir 4:14 (; Jdt 4:14); 1Ma 10:42; (Philo, vit. Moys. 3:18; cf. ὑμῖν λειτουργουσι καί αὐτοί τήν λειτουργίαν τῶν προφητῶν καί διδασκάλων (of bishops and deacons), Teaching of the Twelve Apostles, chapter 15 [ET] (cf. Clement of Rome, 1 Cor. 44, 2 [ET] etc.))): Heb 10:11. b.λειτουργουν τῷ κυρίῳ, of Christians serving Christ, whether, by prayer, or by instructing others concerning the way of salvation, or in some other way: Act 13:2; cf. DeWette at the passage c. of those who aid others with their resources, and relieve their poverty: τίνι ἐν τίνι, Rom 15:27, cf. Sir 10:25.