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
Steeped in tradition, such companies offer rich histories to plumb. Julie Belcove, Robb Report, 8 Mar. 2025 Ayers’ career got a significant revival in the 1990s when, during hip-hop’s Golden Era, sample-minded emcees plumbed his ample catalog and worked his music into theirs. Christie D’zurilla, Los Angeles Times, 6 Mar. 2025 See All Example Sentences for plumb
Recent Examples of Synonyms for plumb
Adjective
  • But that meeting’s collapse—and, more broadly, the utter failure of sanctions to prevent North Korea from developing its nuclear potential—may prompt him to support Seoul’s push.
    John Delury, Foreign Affairs, 3 June 2025
  • The Civil War, which is jeopardizing his presidency, has turned him into an utter killjoy.
    Charles McNulty, Los Angeles Times, 3 June 2025
Adjective
  • Trump also signed orders aimed at clearing the way for a new generation of supersonic jets in the United States, and to encourage the development of electric vertical take-off and landing aircraft or eVTOLs, sometimes described as air taxis.
    Deepa Shivaram, NPR, 6 June 2025
  • The goal is to stay out of the NFC East's cellar, avoid catastrophe, and, hopefully, keep Russell Wilson and crew vertical.
    Geoffrey Knox, MSNBC Newsweek, 4 June 2025
Adverb
  • Get exclusive awards season news, in-depth interviews and columnist Glenn Whipp’s must-read analysis straight to your inbox.
    Glenn Whipp, Los Angeles Times, 6 June 2025
  • Georgia has a lot to process by the end of the finale, and nothing helps a girl clear her head quite like downing milk straight from the bottle.
    Andy Swift, TVLine, 6 June 2025
Adverb
  • After the fire is fully contained, the next step is to control it.
    CA WILDFIRE BOT, Sacbee.com, 9 June 2025
  • Champion said search teams had looked through the area before but couldn't fully investigate because of the high water.
    Jeanine Santucci, USA Today, 8 June 2025
Adverb
  • Fraser might’ve noticed immediately that the bags simply weren’t following behind the guests and the captain.
    Rafaela Bassili, Vulture, 3 June 2025
  • When Crosby was finally ready to go, Tsamis signed him and immediately put him into a pressure situation.
    Paul Johnson, Chicago Tribune, 3 June 2025
Verb
  • Overcoming the reticence at the heart of her shyness was like scaling a cliff only to discover another view of the real summit farther off.
    Jim Shepard, New Yorker, 8 June 2025
  • The administration’s position is clear: AI should be secured before it is scaled.
    Emil Sayegh, Forbes.com, 7 June 2025
Adjective
  • Ait-Nouri is far from a complete Premier League footballer.
    Steve Madeley, New York Times, 6 June 2025
  • Burns and Hudson tackled each other to the ground, and at that point, Daboll had lost complete control of the practice and had to call the team together and end it altogether.
    Pat Leonard, New York Daily News, 5 June 2025
Adjective
  • Carlin said, as soldiers need to guide their horses while keeping erect posture.
    Tom Vanden Brook, USA Today, 27 May 2025
  • In the proceeding years, visitors who wanted to spend the night in the park could rent houseboats, erect tents, or park their camper vans or RVs, but the nearest hotel was located about an hour away in Florida City.
    Mariette Williams, Travel + Leisure, 16 Apr. 2025

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Cite this Entry

“Plumb.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/plumb. Accessed 14 Jun. 2025.

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