A Roman officer commanding a hundred soldiers; similar to "captain" in modern times. Several centurions are mentioned with honor in the New Testament, Mark 15:39; Luke 7:1-10; and the first fruits to Christ from the Gentiles was the generous and devout Cornelius, Acts 10:1-48.
These dictionary topics are from American Tract Society Bible Dictionary published in 1859. Public Domain, copy freely.
Rand, W. W. "Entry for 'CENTURION'". "American Tract Society Bible Dictionary".