Definition of protrusionnext

Synonym Chooser

How is the word protrusion different from other nouns like it?

Some common synonyms of protrusion are bulge, projection, and protuberance. While all these words mean "an extension beyond the normal line or surface," protrusion suggests a thrusting out so that the extension seems a deformity.

the bizarre protrusions of a coral reef

When is it sensible to use bulge instead of protrusion?

The meanings of bulge and protrusion largely overlap; however, bulge suggests an expansion caused by internal pressure.

bulges in the tile floor

When is projection a more appropriate choice than protrusion?

The synonyms projection and protrusion are sometimes interchangeable, but projection implies a jutting out especially at a sharp angle.

those projections along the wall are safety hazards

When would protuberance be a good substitute for protrusion?

The words protuberance and protrusion can be used in similar contexts, but protuberance implies a growing or swelling out in rounded form.

a skin disease marked by warty protuberances

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 protrusion Their name comes from the unique protrusions on their back that resemble horns and serve as a defense mechanism against predators including other sharks, elephant seals and some large fish. Ashley MacKin Solomon, San Diego Union-Tribune, 7 Sep. 2025 Improper footwear may cause or exacerbate bunions, protrusions of the big toe knuckles. Lauren Leffer, Popular Science, 20 Aug. 2025 Advertisement In other cases, however, the protrusions can affect the rabbits’ eyes and mouth, preventing them from being able to eat, drink, or see clearly. Angela Haupt, Time, 14 Aug. 2025 Until recently, most of those changes involved either streamlining the handle itself with a sharper profile and thinner protrusion from the vehicle’s body or moving the handle to a more aero-favorable position. New Atlas, 2 Aug. 2025 See All Example Sentences for protrusion
Recent Examples of Synonyms for protrusion
Noun
  • We’re trapped by recent history — the prior year’s numbers for healthy players are the top factor in every projection.
    Michael Salfino, New York Times, 7 Jan. 2026
  • Current pricing projections place the vehicle under $30,000.
    Aamir Khollam, Interesting Engineering, 7 Jan. 2026
Noun
  • In the far distance lies the Pacific Ocean, and beyond that, featureless protuberances labeled Japan, Russia and China.
    Matthew Carey, Deadline, 1 Sep. 2025
  • Above the central display is a ventilative protuberance sporting a pair of menacing ambient lights.
    Brett Berk, Robb Report, 19 Aug. 2025
Noun
  • Air bubbles, cracks and bulges in a tire's sidewall could all warrant a tire change.
    Charles Singh, USA Today, 6 Nov. 2025
  • In the center is a central bulge of stars, and the whole thing is surrounded by a vast halo of stars and dark matter about a million light-years wide.
    Phil Plait, Scientific American, 6 Nov. 2025
Noun
  • The Table of Contents is divided along the parts of a young body, with sections titled Heads Up!
    Literary Hub, Literary Hub, 10 Nov. 2025
  • Barry points to the central section of the pitch, on either side of the halfway line, to make his point.
    Jack Pitt-Brooke, New York Times, 9 Nov. 2025
Noun
  • Use the dome light and flashers to make your vehicle more noticeable.
    CA Weather Bot, Sacbee.com, 7 Jan. 2026
  • Just 15 minutes outside of town, Cross Hill Lodge & Domes is a lake-facing glamping site with Instagram-worthy geo domes equipped with luxe touches like gas fireplaces and pod coffee machines (from $340).
    Jen Murphy, Outside, 7 Jan. 2026
Noun
  • The site, called Hora 1, is underneath a natural boulder overhang large enough to shelter 30 people.
    Ashley Strickland, CNN Money, 6 Jan. 2026
  • The new Afeela Prototype 2026 looked remarkably similar to the Afeela 1 pre-production unit, with short overhangs, a long wheelbase, and an overall larger footprint.
    Andrew J. Hawkins, The Verge, 6 Jan. 2026
Noun
  • Even more interesting is the fact that Noctua is issuing three variants of the cooler with variations in the convexity of the cold plate: a normal, a high-convexity, and a low-convexity model.
    PCMAG, PCMAG, 10 June 2024
  • Exploiting mispricing in the 21st century will depend more on understanding the convexity of outcomes not yet visible.
    Jeff Henriksen, Forbes, 4 Mar. 2021
Noun
  • That response was to a question specifically about inside linebacker Dre Greenlaw, who missed the Broncos’ final two regular-season games with a hamstring injury and was one of the only players not on the field during a brief portion of Friday’s workout open to reporters.
    Parker Gabriel, Denver Post, 10 Jan. 2026
  • Credit card interest rates represent a significant portion of financial institutions’ revenue.
    Luciana Lopez, CNN Money, 10 Jan. 2026

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Cite this Entry

“Protrusion.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/protrusion. Accessed 11 Jan. 2026.

More from Merriam-Webster on protrusion

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