Boyd’s Bible Dictionary:
(venerable). Caius Julius Caesar Octavianus, grandnephew of, and heir to, Julius Caesar. Made first emperor of Rome B. C. 27, with title of Augustus. During his reign Christ was born (Luke 2:1). Died A. D. 14, aged 76 years.
Concise Bible Dictionary:
Title given to the Roman Emperors after Augustus Caesar, named in Luke 2:1. In Acts 25:21,25 the Augustus or Caesar at that time was Nero.
Strong’s Dictionary of Greek Words:
Transliteration:
Augoustos
Meaning:
from Latin ("august"); Augustus, a title of the Roman emperor
Jackson’s Dictionary of Scripture Proper Names:
radiant (in Luke 2:1 only) : venerable
Potts’ Bible Proper Names:
August; eminent; renowned; consecrated; majestic:―first emperor of Rome [CAESAR], Luke 2:1. {Augustus}