vertical, perpendicular, plumb mean being at right angles to a base line. vertical suggests a line or direction rising straight upward toward a zenith.

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

1. (Building) a weight, usually of lead, suspended at the end of a line and used to determine water depth or verticality 2. (Building) the perpendicular position of a freely suspended plumb line (esp in the …

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 used in a sentence.

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

February 19, 2026 answer of Plumb Mad clue in NYT Crossword Puzzle. There is One Answer total, Loco is the most recent and it has 4 letters.

plumb /plʌm/ n. [countable] Building, Surveying a small mass of lead hung on a line and used to measure the depth of water or to make sure a line is straight up and down.

5 days ago · Adverb plumb (not comparable) In a vertical direction; perpendicularly. (informal) Squarely, directly; deeply, completely.

Plumb definition: A weight on the end of a line, used to determine water depth.