'Minister' in the Bible

And when they were at Salamis, they preached the word of God in the synagogues of the Jews: and they had also John to their minister.

And he commanded a centurion to keep Paul, and to let him have liberty, and that he should forbid none of his acquaintance to minister or come unto him.

But rise, and stand upon thy feet: for I have appeared unto thee for this purpose, to make thee a minister and a witness both of these things which thou hast seen, and of those things in the which I will appear unto thee;