Excess fluid flowing from or spilling out of a container.
Overflow hood
On a bath drain, the decorative hood concealing the overflow.
Overflow tube
The vertical tube inside a toilet tank that directs water into the bowl in case the ballcock malfunctions. It is usually part of the flush valve. It prevents potential water damage caused by a tank overflow. A "constant-running" condition alerts the user to a problem. On most toilets, the overflow tube also has a refill tube flowing into it, which directs water from the ballcock through the overflow tube to the bowl, after a siphon break.
Overhand work
Brick laying from the inside of a wall done by workers who are standing on a scaffold or inside the wall.
Overhang
A projection of one part of a structure over another part of that structure. Also a length of rafter that extends beyond a building's exterior wall.
Overhang ladder
A construct to extend a roof beyond the gable end.
Overhaul
To repair or to perform maintenance on a device.
Overhead
The fixed costs of doing business, not directly related to a specific job or project. Overhead includes items such as senior management salaries, office rent, and administrative costs.
Overhead door
A door that is lifted upward and overhead to open. Garage doors are the most common overhead doors.
Overhead position
Position for welding where the actual weld is overhead and applied from beneath the joint.
