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

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
An actor’s job is to plumb emotions at a moment’s notice. Anne Thompson, IndieWire, 19 Nov. 2025 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
Verb
Some countries pump out aircraft carriers to project power across the globe; others build research megastructures to plumb the ocean depths. Joe Wilkins, Futurism, 2 Apr. 2026 Maurizio Cattelan, who also wielded a banana with profound memetic effectiveness, is one of the few other artists whose work has this kind of stickiness, but his recent sculptures have leaned more on the public’s appetite for stunts, whereas Rødland plumbs more mysterious depths. Chris Wiley, New Yorker, 28 Mar. 2026 See All Example Sentences for plumb
Recent Examples of Synonyms for plumb
Adjective
  • Not when the meltdown is that complete, that historic, that humiliating.
    Mike Bianchi, The Orlando Sentinel, 4 May 2026
  • Focus on what’s essential, complete one thing well, and let that steady your pace throughout the day.
    Tarot.com, Sun Sentinel, 4 May 2026
Adjective
  • His hotel in Las Vegas glistens like a vertical gold bar.
    Jennifer Wilson, New Yorker, 4 May 2026
  • The agency, which maintains the vertical-lift bridge, said the $3 million emergency project aims to build scaffolding and rigging lines, remove old parts and install new electrical lines.
    Nicole Buss, Sacbee.com, 4 May 2026
Adverb
  • Grab your cowboy boots and head to Idaho’s most popular Airbnb listing — a rustic saloon straight out of the Wild West.
    Hali Smith May 3, Idaho Statesman, 3 May 2026
  • Many come straight from incarceration, others struggle with mental illness and addiction.
    Niki Donohue, New York Daily News, 3 May 2026
Adverb
  • Matt hopped on Reddit and pleaded for his fellow Sixers fans to buy Amtrak Flex tickets, which are fully refundable if canceled before the train departs.
    Matt Reigle OutKick, FOXNews.com, 9 May 2026
  • Canvas is now fully back online and available for use, Instructure noted.
    Jon Haworth, ABC News, 8 May 2026
Adverb
  • Neither Moorer nor his attorney could immediately be reached for comment.
    Jason Meisner, Chicago Tribune, 7 May 2026
  • His condition was not immediately clear.
    Kerry Burke, New York Daily News, 7 May 2026
Verb
  • Up next, the goal is to scale this framework across diverse applications, such as lithium-ion batteries and electric vehicles.
    Mrigakshi Dixit, Interesting Engineering, 6 May 2026
  • Lindell’s lab, funded by MARINER, focused on improving crop yield by selectively breeding kelp with desirable qualities — such as nonreproductive capabilities to prevent interbreeding with wild kelp — so that, down the line, farmers could scale up their kelp production.
    ABC News, ABC News, 6 May 2026
Adjective
  • The obituaries, social media posts, and GoFundMe pages capture the utter despair of the families, though none of them reckon with the decision not to get the vitamin K shot.
    Lee Hutchinson, ArsTechnica, 6 May 2026
  • The obituaries, social media posts and GoFundMe pages capture the utter despair of the families, though none of them reckon with the decision not to get the vitamin K shot.
    Duaa Eldeib, ProPublica, 6 May 2026
Adjective
  • The solitary daisy-like golden yellow flowers emerge from slender, erect stems.
    Jamie McIntosh, The Spruce, 5 May 2026
  • The chickens stomp with swift feet like an Irish step dancer, keeping their tails erect and wings drooped.
    Laura Baisas, Popular Science, 29 Apr. 2026

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Cite this Entry

“Plumb.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/plumb. Accessed 9 May. 2026.

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