1: ἀρχάγγελος
(Strong's #743 — Noun Masculine — archangelos — ar-khang'-el-os )

"is not found in the OT, and in the NT only in 1—Thessalonians 4:16 and Jude 1:9 , where it is used of Michael, who in Daniel is called 'one of the chief princes,' and 'the great prince' (Sept., 'the great angel'), 10:13,21; 12:1. Cp. also Revelation 12:7 .... Whether there are other beings of this exalted rank in the heavenly hosts, Scripture does not say, though the description 'one of the chief princes' suggests that this may be the case; cp. also Romans 8:38; Ephesians 1:21; Colossians 1:16 , where the word translated 'principalities' is arche, the prefix in archangel." * [* From Notes on Thessalonians, by Hogg and Vine, pp. 142.] In 1—Thessalonians 4:16 the meaning seems to be that the voice of the Lord Jesus will be of the character of an "archangelic" shout.