To determine the depth, generally of a liquid; to sound.
To attach to a water supply and drain.
To think about or explore in depth, to get to the bottom of, especially to plumb the depths of.
To use a plumb bob as a measuring or aligning tool.
To accurately align vertically or horizontally.
To seal something with lead.
To work as a plumber.
To fall or sink like a plummet.
To trace a road or track; to follow it to its end.
To position vertically above or below.