vertical, perpendicular, plumb mean being at right angles to a base line. vertical suggests a line or direction rising straight upward toward a zenith. perpendicular may stress the straightness of a …

plumb verb [T] (DEEP) engineering specialized to measure how deep something is, especially water to understand or discover all about something:

1. Exactly vertical. See Synonyms at vertical. 2. also plum Informal Utter; absolute; sheer: a plumb fool.

Plumb is used to give emphasis to an adjective or verb that describes a feeling or condition.

Plumb definition: a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line.. See examples of PLUMB …

To plumb a body of water, you measure its depth. To plumb a house, you connect all of its pipes. To make carpentry plumb, you get it exactly vertical. Originally, the verb plumb only meant “to …

Sep 24, 2024 · In construction or carpentry, the term plumb refers to a line or feature that is perfectly vertical. In technical design, it represents an imaginary line that runs straight to the …

Nov 2, 2025 · plumb (third-person singular simple present plumbs, present participle plumbing, simple past and past participle plumbed) To determine the depth, generally of a liquid; to sound.

Factsheet What does the word plumb mean? There are nine meanings listed in OED's entry for the word plumb, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, …

plumb (plum), n. Building, Surveying a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line. Cf. …