(nautical) To tack; to change tack; to maneuver the bow of a sailing vessel across the wind so that the wind changes from one side of the vessel to the other; to position a boat with respect to the wind after tacking. See also come to.
To change; to come round.
ShakespeareThe wind is come about.
Ben JonsonOn better thoughts, and my urged reasons, They are come about, and won to the true side.