plumb 1 of 3

Definition of plumbnext

plumb

2 of 3

adverb

1
as in straight
in a direct line or course I can't believe he walked plumb into the tree, without even seeing it!

Synonyms & Similar Words

Antonyms & Near Antonyms

2
3

plumb

3 of 3

verb

as in to scale
to measure the depth of (as a body of water) typically with a weighted line plumbed the bay to make sure it was deep enough for the ship

Synonyms & Similar Words

Synonym Chooser

How does the adjective plumb differ from other similar words?

The words perpendicular and vertical are common synonyms of plumb. While all three words mean "being at right angles to a base line," plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity.

make sure that the wall is plumb

When might perpendicular be a better fit than plumb?

Although the words perpendicular and plumb have much in common, perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.

the parallel bars are perpendicular to the support posts

In what contexts can vertical take the place of plumb?

In some situations, the words vertical and plumb are roughly equivalent. However, vertical suggests a line or direction rising straight upward toward a zenith.

the side of the cliff is almost vertical

How does the adjective plumb differ from other similar words?

The words perpendicular and vertical are common synonyms of plumb. While all three words mean "being at right angles to a base line," plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity.

make sure that the wall is plumb

When might perpendicular be a better fit than plumb?

Although the words perpendicular and plumb have much in common, perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.

the parallel bars are perpendicular to the support posts

In what contexts can vertical take the place of plumb?

In some situations, the words vertical and plumb are roughly equivalent. However, vertical suggests a line or direction rising straight upward toward a zenith.

the side of the cliff is almost vertical

How does the adjective plumb differ from other similar words?

The words perpendicular and vertical are common synonyms of plumb. While all three words mean "being at right angles to a base line," plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity.

make sure that the wall is plumb

When might perpendicular be a better fit than plumb?

Although the words perpendicular and plumb have much in common, perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.

the parallel bars are perpendicular to the support posts

In what contexts can vertical take the place of plumb?

In some situations, the words vertical and plumb are roughly equivalent. However, vertical suggests a line or direction rising straight upward toward a zenith.

the side of the cliff is almost vertical

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of plumb
Adjective
On Tuesday morning, the parking lot and the gravel road near the Oglala Commodity Warehouse in Pine Ridge was plumb-full of pick-up trucks and cars. Alicia Wallace, CNN Money, 7 Nov. 2025 In My Mother and Eye, 2025, a sweeping Public Art Fund project installed in bus shelters across New York City, Boston, and Chicago, eleven discrete photographic collages plumb this intangible meeting point. Jessica Simmons-Reid, Artforum, 1 June 2025
Verb
The attic bedroom is actually relatively contemporary, with shiny hardwood floors and plumbing cleverly doubling as stair railing. Christopher Borrelli, Chicago Tribune, 6 Feb. 2026 The company will also conduct building-wide HVAC repairs and plumbing upgrades by the end of March. Ilana Arougheti, Kansas City Star, 30 Jan. 2026 See All Example Sentences for plumb
Recent Examples of Synonyms for plumb
Adjective
  • State-of-the-art sound and lighting complete the experience, making every workout feel elevated.
    Condé Nast, Condé Nast Traveler, 2 Mar. 2026
  • Lipow cautioned that a complete closure of the Strait of Hormuz could drive oil prices up by as much as $20 per barrel, translating to a 50-cent increase in the price per gallon of gasoline.
    Garrett Downs,Greg Iacurci,Azhar Sukri,Spriha Srivastava,Emma Graham,Lee Ying Shan,Anniek Bao, CNBC, 1 Mar. 2026
Adjective
  • Brighter X-ray emissions may become higher or louder notes, while vertical position can shift pitch and stereo placement.
    Samantha Mathewson, Space.com, 2 Mar. 2026
  • After a brief period of sourcing from a vertical manufacturer, the brand is back to sourcing fabrics from Candiani Denim.
    Angela Velasquez, Sourcing Journal, 2 Mar. 2026
Adverb
  • These pairs offer a full range of motion, UPF sun protection, and the versatility to roll up, zip off, and head straight from trail to town.
    Jessica Chapel, Condé Nast Traveler, 1 Mar. 2026
  • After three straight colder-than-normal months, March is likely to tilt milder overall.
    Jason Samenow, Washington Post, 1 Mar. 2026
Adverb
  • The separate Disability Insurance Trust Fund is fully funded through at least 2099, the agency reports.
    Medora Lee, USA Today, 28 Feb. 2026
  • This prominent man, revered by generations of Americans, had never fully cashed in on his fame like so many others did.
    Rick Davis, CNN Money, 27 Feb. 2026
Adverb
  • Earlier in the day, Sri Lankan Navy spokesman Budhika Sampath said rescue teams initially spotted oil patches and life rafts on the surface but could not immediately locate the vessel.
    Sujita Sinha, Interesting Engineering, 5 Mar. 2026
  • Gonzales was not immediately accused of any wrongdoing by the committee.
    Zachary Schermele, USA Today, 5 Mar. 2026
Verb
  • While Intuitive Surgical’s sales to Fortinet have scaled back its holdings in Sunnyvale, the maker of a cutting-edge surgical robot has created a huge campus at the corner of Kifer Road and Commercial Street.
    George Avalos, Mercury News, 4 Mar. 2026
  • In a nod to critics who worried the building would dwarf the famous dive tower, developer Mario Caprini and his team scaled back the west building’s height from the equivalent of 13 stories to six.
    Susannah Bryan, Sun Sentinel, 4 Mar. 2026
Adjective
  • In gangland circles, women are casually murdered and mutilated, their killers operating with utter impunity.
    Richard Brody, New Yorker, 4 Mar. 2026
  • What happened next resulted in pandemonium for Norwell and utter disbelief for Swampscott as Fein’s shot swished through the net to give the Clippers a 43-42 victory.
    Greg Dudek, Boston Herald, 4 Mar. 2026
Adjective
  • The same rush to rename buildings, erect statues, hang massive banners of faces and publicly declare fealty to the leader in power is on display in North Korea, Cuba and the former Soviet Union.
    Sun Sentinel Editorial Board, Sun Sentinel, 27 Feb. 2026
  • According to the woman Hernandez became erect while touching her back and stomach, then covered himself with a pillow, the affidavit read.
    Shambhavi Rimal, Fort Worth Star-Telegram, 4 Feb. 2026

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Cite this Entry

“Plumb.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/plumb. Accessed 6 Mar. 2026.

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