Dictionary.com
Thesaurus.com

kneecap

American  
[nee-kap] / ˈniˌkæp /

noun

  • kneecaps
    plural
  1. the patella.

  2. a protective covering, usually knitted, for the knee.


verb (used with object)

  • kneecaps,
    present (3rd person singular)
  • kneecapped,
    past participle,  past
  • kneecapping
    present participle
  1. to cripple (a person) by shooting in the knee.

    Terrorists were kneecapping prospective jurors.

kneecap British  
/ ˈniːˌkæp /

noun

  1. anatomy a nontechnical name for patella

  2. another word for poleyn

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (esp of certain terrorist groups) to shoot (a person) in the kneecap, esp as an act of retaliation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
kneecap Scientific  
/ nēkăp′ /
  1. See patella


Other Word Forms

Derived Forms

Inflected Forms

Nouns

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of kneecap

First recorded in 1650–60; knee + cap 1

Explanation

Your kneecap is the bony plate that covers the joint in the middle of your leg, between your thigh and shin. Whales don't have kneecaps, but it might surprise you to know that mice and birds do. The kneecap is just what it sounds like, a protective cap for your vulnerable knee. While the official anatomical term is patella, it's far more common to call this body part a kneecap. When babies are small, their kneecaps are made of soft cartilage, but by the time they're about three they harden into strong bone. If you're a fan of Mafia movies, you might also recognize the verb kneecap, "to shoot someone in the knee."

Keep Reading on Vocabulary.com

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Late Friday, an Iranian official detailed Khamenei’s injuries for the first time, saying his kneecap and back had been wounded in the strike that killed his father.

From The Wall Street Journal May 10, 2026

Savitt, an OpenAI lawyer, said the lawsuit was motivated by Musk seeking to kneecap a "competitor".

From BBC Apr. 29, 2026

Now legal attacks from outside threaten to kneecap it entirely.

From Los Angeles Times Feb. 27, 2026

Few if any government spokespeople have done more to kneecap their own agency in court than McLaughlin.

From Slate Feb. 18, 2026

Twice a day, he had to let planes fly in and out, landing on his kneecap.

From "Chronicles of a Lizard Nobody" by Patrick Ness

Early last year, Leno crashed his motorcycle and wound up with a broken collarbone, two broken ribs and two cracked kneecaps.

From Los Angeles Times Nov. 19, 2024

The Fed is trying to pull of the difficult feat of slowing the economy enough through high interest rates to stifle high inflation but not so much that it kneecaps the job market.

From Seattle Times May 26, 2024

But some runners showed symptoms of new, if slight, damage in the bones and cartilage right around their kneecaps, a part of the joint that absorbs much of the pounding from running.

From Washington Post Oct. 19, 2022

As an example, when I underwent laser treatment, my calves and thighs didn’t hurt very much, but shins and kneecaps did.

From Slate Apr. 8, 2021

The sores on his kneecaps never heal because he picks at the scabs and puts them in his mouth.

From "Angela's Ashes: A Memoir" by Frank McCourt

For weeks, automakers and suppliers have publicly sounded an optimistic tone, pointing to the industry’s lessons from a semiconductor crisis a few years ago that kneecapped production around the world.

From The Wall Street Journal Oct. 28, 2025

In the decade and a half before the GCA kneecapped his war-surplus business, Cummings imported some 5 million firearms for distribution on the U.S. consumer market.

From Slate May 25, 2025

But her production lines were being constantly kneecapped by the start-stop of the grid.

From Salon Mar. 27, 2025

The systemic bias of the music industry may be a burden, but it hasn’t completely kneecapped Uchis on her road to fame.

From Los Angeles Times Jan. 11, 2024

The $4 billion dividend payment would have kneecapped Albertsons.

From Seattle Times Nov. 8, 2022

Fable comes with broad restrictions Anthropic says are aimed at kneecapping its ability to assist users with potentially dangerous activities.

From The Wall Street Journal Jun. 11, 2026

"We should not be kneecapping America's largest source of renewable power, especially when we need more cheap, homegrown electricity," the Environmental Defense Fund's lead counsel Ted Kelly said in a statement.

From Barron's Dec. 22, 2025

These deals, a notable result of the pandemic kneecapping the movie theater business, haven’t changed much since they were first implemented at the top of the decade.

From Salon May 22, 2025

The most obvious proof of “Folie à Deux” misunderstanding the musical is the odd decision to cut the majority of these sequences short, kneecapping decades-old compositions before their emotional and musical resolutions.

From Los Angeles Times Oct. 7, 2024

Don’t thank him for his support by kneecapping his marriage.

From Washington Post Apr. 5, 2023

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training