Emperor - Vine's Expository Dictionary of New Testament Words
Emperor[ 1,,G4575, sebastos ]
august, reverent," the masculine gender of an adjective (from sebas, "reverential awe"), became used as the title of the Roman emperor, Acts 25:21, Acts 25:25, RV, for AV, "Augustus;" then, taking its name from the emperor, it became a title of honor applied to certain legions or cohorts or battalions, marked for their valor, Acts 27:1. Cp. sebazomai, "to worship," Romans 1:25; sebasma, "an object of worship," Acts 17:23; 2 Thessalonians 2:4.