Meaning

• To come to pass; to develop; to occur; to take place; to happen.

  "We have to ask, how did this come about?"

• 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.