Boyd’s Bible Dictionary:
(hundred). A Roman officer who had command of a hundred soldiers (Matt. 8:5; Mark 15:39; Luke 7:1-10; Acts 10:1).
Concise Bible Dictionary:
An officer over (about) 100 men: they were promoted to this office because of their good conduct and trustworthiness, and it is to be remarked how often centurions are favorably noticed in the Gospels and the Acts (Matt. 8:5-13; Luke 23:47; Acts 10:1,22; Acts 27:6, etc.).
Strong’s Dictionary of Greek Words:
Transliteration:
hekatontarches
Phonic:
hek-at-on-tar’-khace
Meaning:
or ἑκατόνταρχος (hek-at-on'-tar-khos) from 1540 and 757; the captain of one hundred men