From basileus; regal (in relation), i.e. (literally) belonging to (or befitting) the sovereign (as land, dress, or a courtier), or (figuratively) preeminent -- king's, nobleman, royal.
KJV: And Herod was highly displeased with them of Tyre and Sidon: but they came with one accord to him, and, having made Blastus the king's chamberlain their friend, desired peace; because their country was nourished by the king'scountry.
NASB: Now he was very angry with the people of Tyre and Sidon; and with one accord they came to him, and having won over Blastus the king's chamberlain, they were asking for peace, because their country was fed by the king's country.