σαβαώθ indecl., [in LXX for צָבָא, chiefly in Isaiah (in other places, the phrase is also rendered by κύριος παντοκράτωρ, κ. τῶν δυνάμεων; see DB, iii, 137 f.) ;] Sabaoth, i.e. hosts or armies (see DB, l.with): Rom.9:29 (LXX), Ja 54.† (AS)
Thayer:
1) "Lord of Sabaoth" 1a) Lord of the armies of Israel, as those who are under the leadership and protection of Jehovah maintain his cause in war
σαβαώθ
sabaōth
sab-ah-owth'
Of Hebrew origin ([H6635] in feminine plural); armies; sabaoth (that is, tsebaoth), a military epithet of God
צבאה צבא
tsâbâ' tsebâ'âh
tsaw-baw',tseb-aw-aw'
From H6633; a mass of persons (or figurative things), especially regularly organized for war (an army); by implication a campaign, literally or figuratively (specifically hardship, worship)
KJV Usage: appointed time, (+) army, (+) battle, company, host, service, soldiers, waiting upon, war (-fare).