| 1. | a valve controlling flow by means of a ball pierced with an opening in one direction and fixed to rotate on a spindle at right angles to the opening. |
| 2. | any valve that checks flow by the seating of a ball. |
| ball valve n. A valve regulated by the position of a free-floating ball that moves in response to fluid or mechanical pressure. |
ball valve n.
A valve regulated by the position of a free-floating ball that moves in response to fluid or mechanical pressure.
