pro·​tru·​sion | \ prō-ˈtrü-zhən How to pronounce protrusion (audio) \

Definition of protrusion

1 : something (such as an anatomical part or excrescence) that protrudes
2 : the act of protruding : the state of being protruded

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Choose the Right Synonym for protrusion

projection, protrusion, protuberance, bulge mean an extension beyond the normal line or surface. projection implies a jutting out especially at a sharp angle. those projections along the wall are safety hazards protrusion suggests a thrusting out so that the extension seems a deformity. the bizarre protrusions of a coral reef protuberance implies a growing or swelling out in rounded form. a skin disease marked by warty protuberances bulge suggests an expansion caused by internal pressure. bulges in the tile floor

Examples of protrusion in a Sentence

bony protrusions on the outside of the elbow a roof with many protrusions The pain was caused by a protrusion of a disc in his lower back.
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Recent Examples on the Web Skin must be soft enough to gain traction when reaching for a slight crevice or protrusion, yet durable enough to withstand constant wear and tear. David Wharton, Los Angeles Times, 5 Aug. 2021 Designed to look like a ship, the house has an enormous prow-like architectural protrusion over the entryway. Katherine Clarke, WSJ, 30 July 2021 Hallux valgus is a small deformity that finds the big toe angled outward with a bony protrusion at its base—a development that makes walking painful. Nora Mcgreevy, Smithsonian Magazine, 14 June 2021 The number 22 is inspired by both the team’s inaugural season, 2022, and the 22 players on the pitch, while the wing’s protrusion represents the team breaking the mold of expectation. Kevin Baxter, Los Angeles Times, 30 June 2021 By significantly reducing the earbud’s dimensions, QuietOn succeeded in creating the first ANC earbud that fits entirely in the ear, with zero protrusion. Mark Sparrow, Forbes, 25 May 2021 The protrusion will be most noticeable on iPhone 13 Pro, the report says. Chris Smith, BGR, 11 May 2021 If the entire phone is thicker, the camera protrusion might appear less evident. Chris Smith, BGR, 11 May 2021 Picture your big toe leaning sideways, toward your other four toes, and a large bony protrusion sticking out in the other direction — that's a bunion. Rebecca Dancer, Allure, 14 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'protrusion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of protrusion

1646, in the meaning defined at sense 2

History and Etymology for protrusion

Latin protrudere

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Time Traveler for protrusion

Time Traveler

The first known use of protrusion was in 1646

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Dictionary Entries Near protrusion




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Statistics for protrusion

Last Updated

17 Aug 2021

Cite this Entry

“Protrusion.” Dictionary, Merriam-Webster, Accessed 16 Sep. 2021.

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More Definitions for protrusion



English Language Learners Definition of protrusion

: a part that sticks out
: the act of sticking out or the condition of something that sticks out


pro·​tru·​sion | \ prō-ˈtrü-zhən How to pronounce protrusion (audio) \

Medical Definition of protrusion

1 : the quality or state of protruding the protrusion of a jaw
2 : something (as an anatomical part) that protrudes

More from Merriam-Webster on protrusion

Nglish: Translation of protrusion for Spanish Speakers

Britannica English: Translation of protrusion for Arabic Speakers


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