1:
Sabaoth — the transliteration of the Hebrew word tsebha˒oth, meaning “hosts,” “armies” (Rom. 9:29; James 5:4). In the LXX. the Hebrew word is rendered by “Almighty.” (See Rev. 4:8; comp. Isa. 6:3.) It may designate Jehovah as either (1) God of the armies of earth, or (2) God of the armies of the stars, or (3) God of the unseen armies of angels; or perhaps it may include all these ideas.
Easton, M. (1996, c1897). Easton's Bible dictionary. Oak Harbor, WA: Logos Research Systems, Inc.
2:
SABAOTH Hebrew word meaning “hosts” or “army,” as in the expression “Lord of hosts.” See God, Names of.
Elwell, W. A., & Comfort, P. W. (2001). Tyndale Bible dictionary. Tyndale reference library (1146). Wheaton, Ill.: Tyndale House Publishers.
3:
SAB´AOTH (Gk. sabaōth, for Heb. ṣbā˒ôt, “armies,” Rom. 9:29; James 5:4; “Almighty,” NIV). In the OT it frequently occurs in the epithet “Jehovah, God of hosts,” or simply “Jehovah of hosts.” This epithet “Jehovah, God of hosts” designates Him as the supreme head and commander of all the heavenly forces, so that the host of Jehovah and the host of heaven are the same (1 Kings 22:19), that is, the angels, who are the Lord’s agents, ever ready to execute His will. It is never applied to God with reference to the army of Israel, although once the companies composing it are called “the hosts of the Lord” (Ex. 12:41), because they were under His guidance and were to fight for His cause.
Unger, M. F., Harrison, R. K., Vos, H. F., Barber, C. J., & Unger, M. F. (1988). The new Unger's Bible dictionary. Revision of: Unger's Bible dictionary. 3rd ed. c1966. (Rev. and updated ed.). Chicago: Moody Press.