plumb 1 of 3

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

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
Mars will appear plumb against its sparkling stars tonight — though the couple of nights either side will also give a great binocular view. Jamie Carter, Forbes, 6 Mar. 2025 Its clean lines with plumb bow at first appear European, though the twin outboards at the stern signify it as an American boat. Michael Verdon, Robb Report, 14 Feb. 2025
Verb
The new film from Jesse Armstrong, the creator of Succession, plumbs some familiar ground with its cast of rich people trying to get richer in the face of disaster. K. Thor Jensen, PC Magazine, 30 May 2025 The series plumbs the painful consequences of fractured parent-child relationships and their impact on life decisions, Beta Film has noted. Marta Balaga, Variety, 11 Feb. 2025 See All Example Sentences for plumb
Recent Examples of Synonyms for plumb
Adjective
  • Amid all the looming consciousness that our time on earth is precious, there are also specials unerringly devoted to utter stupidity, and even the comedians fixated on mortality are delivering life-affirming material, too.
    Kathryn VanArendonk, Vulture, 6 Aug. 2025
  • At my worst, there was utter loneliness and anhedonia.
    Stuart Miller, Oc Register, 5 Aug. 2025
Adjective
  • The intense surface heating will bring strong vertical mixing to depths extending over 15-17 thousand feet --highest Thursday and Friday.
    CA Weather Bot, Sacbee.com, 17 Aug. 2025
  • Career growth inside companies still follows a narrow script—progress often defined by vertical movement alone.
    Vibhas Ratanjee, Forbes.com, 17 Aug. 2025
Adverb
  • Women with larger bust sizes know that finding the right bra is an experience straight out of the pages of Goldilocks and the Three Bears.
    Izzy Baskette, People.com, 7 Aug. 2025
  • Below are all of the new appointees’ official bios, straight from the incoming Paramount Skydance team: Don Granger President, Motion Picture Group As President, Motion Picture Group, Don will be in charge of motion picture creative, physical production, business affairs, and production finance.
    Tony Maglio, HollywoodReporter, 6 Aug. 2025
Adverb
  • One of the world's most prolific serial killers, Bundy confessed to murdering at least 30 women and young girls between 1974 and 1978, and investigators suspect that there may be many more victims, as the extent of his crimes (which also included rape and kidnapping) isn't fully known.
    Jessica Sager, People.com, 7 Aug. 2025
  • Your goal isn't to agree or disagree but to fully comprehend the other person's perspective—their reasoning, their concerns, their hopes.
    Heather Heefner, Forbes.com, 7 Aug. 2025
Adverb
  • According to police, the child was immediately transported by ambulance to Connecticut Children’s Medical Center in Hartford where they were listed in stable condition after receiving stitches for head scalp wounds.
    Staff report, Hartford Courant, 13 Aug. 2025
  • Restaurants with more than 30 demerits are required to fix the worst problems immediately and remedy the rest within 48 hours.
    Ella Gonzales, Fort Worth Star-Telegram, 13 Aug. 2025
Verb
  • There has been much debate on whether AI’s scaling laws would continue to hold, and whether AI systems would continue to achieve higher performance as the size of the training data, model parameters, or computational resources increase.
    Eliza Strickland, IEEE Spectrum, 7 Aug. 2025
  • If India scales back imports of Russian oil, Moscow could still gain revenue if crude prices spike.
    Liz Hoffman, semafor.com, 7 Aug. 2025
Adjective
  • In a separate report, The Information said regulators in China have ordered major tech companies, including ByteDance, Alibaba, and Tencent, to suspend Nvidia chip purchases until a national security review is complete.
    Celia Fernandez, CNBC, 16 Aug. 2025
  • Shi noted that her short was still early in its festival run but told IndieWire that the feature treatment is already complete.
    Alison Foreman, IndieWire, 15 Aug. 2025
Adjective
  • The name of Fort Benning, for example, was suggested by the United Daughters of the Confederacy, an organization that sought to rewrite history textbooks and erect monuments that honored the Confederacy and downplayed slavery's centrality to the Civil War.
    Davis Winkie, USA Today, 19 July 2025
  • Construction crews pour concrete and erect steel faster every year, yet one stubborn line item keeps projects over budget: paperwork.
    Shuangling Yin, Forbes.com, 17 June 2025

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Cite this Entry

“Plumb.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/plumb. Accessed 21 Aug. 2025.

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