1) to serve for hire
 2) to serve, minister to, either to the gods or men and used
    alike of slaves and freemen
    2a) in the NT, to render religious service or homage, to worship
    2b) to perform sacred services, to offer gifts, to worship God in
        the observance of the rites instituted for his worship
        2b1) of priests, to officiate, to discharge the sacred office