Definitions

1. verb

to examine or investigate (something) thoroughly, especially a building or its structure, to determine its stability or soundness

“The engineer decided to plumb the foundation of the old building to see if it was safe.”

2. verb

to sink or be sunk (something) in order to determine its depth or position, especially with a plummet or plumb-line

“The diver had to plumb the depths of the ocean to find the lost treasure.”

3. noun

a vertical line or cord used for measuring or determining the position or depth of something, especially in surveying or building

“The surveyor used a plumb to ensure the building was perfectly level.”

4. adjective

perfectly level or upright, or perfectly vertical

“The flagpole was plumb and stood tall in the middle of the park.”

5. noun

a plumbing fixture or device, such as a pipe or a valve, used for controlling the flow of water or other fluids

“The plumber had to fix the faulty plumb in the kitchen sink.”

6. noun

a unit of measurement used in the UK to express the amount of lead in a liquid, equal to one part of lead in 100,000 parts of the liquid

“The mixture had a high plumb content, so it was not suitable for drinking.”