To fasten, secure; to equip; prepare.

GIRD thy sword upon thy thigh, O most mighty, with thy glory and thy majesty. And in thy majesty ride prosperously because of truth and meekness and righteousness; and thy right hand shall teach thee terrible things. Thine arrows are sharp in the heart of the king's enemies; whereby the people fall under thee. ( Psalm 45:3-5 )

Dictionary of Words from the King James Bible. Public Domain. Copy freely.