(nautical) A weight on the end of a long line, used by sailors to determine the depth of water.
A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.
Obsolete form of plum (“the fruit”).
The perpendicular direction or position.
verb
(US, colloquial, figuratively, obsolete) To trace a road or track; to follow it to its end.
(dated) To seal something with lead.
(intransitive) To work as a plumber.
(nautical) To position vertically above or below.
(rare) To fall or sink like a plummet.
(transitive, figurative) To think about or explore in depth, to get to the bottom of, especially to plumb the depths of.
To accurately align vertically or horizontally.
To attach to a water supply and drain.
To determine the depth, generally of a liquid; to sound.
To use a plumb bob as a measuring or aligning tool.
umbel
umbel
noun
(botany) A flat-topped or rounded flower-cluster (= inflorescence) in which the individual flower stalks arise from the same point, the youngest flowers being at the centre.