come about

verb3

1. •
   To come to pass; to develop; to occur; to take place; to happen; to exist.

   • We have to ask, how did this come about?
2. •
   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.
3. •
   To change; to come round.

   • The wind is come about. — 1596