knee

American  

[nee] / ni /

noun

1. Anatomy. the joint of the leg that allows for movement between the femur and tibia and is protected by the patella; the central area of the leg between the thigh and the lower leg.

2. Zoology. the corresponding joint or region in the hind leg of a quadruped; stifle.

3. a joint or region likened to this but not anatomically homologous with it, as the tarsal joint of a bird, the carpal joint in the forelimb of the horse or cow, etc.

4. the part of a garment covering the knee.

5. something resembling a bent knee, especially a rigid or braced angle between two framing members.

6. Also called hip, shoulder.  Furniture. the inward curve toward the top of a cabriole leg.

7. Building Trades.

   1. the junction of the top and either of the uprights of a bent.

   2. a curved member for reinforcing the junction of two pieces meeting at an angle.

8. Also called kneeler.  a stone cut to follow a sharp return angle.

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verb (used with object)

kneed, kneeing

1. to strike or touch with the knee.

2. to secure (a structure, as a bent) with a knee.

verb (used without object)

kneed, kneeing

1. Obsolete. to go down on the knees; kneel.

idioms

1. take a knee, to kneel on one knee, usually with the opposite leg also bent at a 90-degree angle and placed forward with the foot on the ground, as in sports or as a posture in protests and demonstrations: Organizers are coordinating so the crowds at every state capitol will take a knee in protest of racial injustice simultaneously, across time zones.

   Our soccer team would take a knee if a player on either team was injured.

   Organizers are coordinating so the crowds at every state capitol will take a knee in protest of racial injustice simultaneously, across time zones.

2. bring someone to his / her knees, to force someone into submission or compliance.

3. on one's / its knees,

   1. in a supplicatory position or manner.

      I came to him on my knees for the money.

   2. in a desperate or declining condition.

      The country's economy is on its knees.

4. cut (someone) off at the knees, to squelch or humiliate (a person) suddenly and thoroughly.

   The speaker cut the heckler off at the knees.

knee British  

/ niː /

noun

1. Technical name: genu.  the joint of the human leg connecting the tibia and fibula with the femur and protected in front by the patella

2. 1. the area surrounding and above this joint

   2. (modifier) reaching or covering the knee

      knee breeches

      knee socks

3. a corresponding or similar part in other vertebrates

4. the part of a garment that covers the knee

5. the upper surface of a seated person's thigh

   the child sat on her mother's knee

6. anything resembling a knee in action, such as a device pivoted to allow one member angular movement in relation to another

7. anything resembling a knee in shape, such as an angular bend in a pipe

8. any of the hollow rounded protuberances that project upwards from the roots of the swamp cypress: thought to aid respiration in waterlogged soil

9. to kneel or submit

10. to force someone into submission

11. to cause something to be in a weakened or impoverished state

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verb

1. (tr) to strike, nudge, or push with the knee

knee More Idioms  

More idioms and phrases containing knee

• bring to one's knees
• on bended knee

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Etymology

Origin of knee

First recorded before 900; Middle English kne, cne, knei, cneo, Old English cnēo(w); cognate with German Knie, Dutch knie, Old Norse knē, Gothic kniu, Latin genu, Greek góny, Sanskrit jānu, Hittite genu, all meaning “knee”

Explanation

Your knee is the joint in your leg that joins your thigh with your shin, making it possible for you to bend your leg. Without knees, you'd walk like a Barbie doll on very stiff legs. The knee connects your tibia, or shinbone, to your femur, or thighbone. Although their bodies are arranged in different ways, there are other animals with knees, including horses, donkeys, giraffes, and deer. You can also use the word knee to mean the part of your pants that covers your actual knee: "I always get a hole in the knee of my jeans." A "knee-slapper" is a joke so funny it makes you laugh out loud.

Example Sentences

Or that an idea he had when looking at a children's playground would spark a novel way to improve recovery from knee injuries.

From BBC • Apr. 14, 2026

McKechnie - who once said he treats "broken-down athletes who are almost like reclamation projects" - had discovered Hargreaves' knee issues were caused by pelvic instability and therefore got him working to strengthen his core.

From BBC • Apr. 14, 2026

Despite his insistence that he was healthy fairly soon after he suffered a left knee hyperextension and bone bruise March 15, Antetokounmpo didn’t play in the last 15 games of the season.

From Los Angeles Times • Apr. 13, 2026

I could go on, but I’m running late for a physical-therapy appointment for my knee.

From The Wall Street Journal • Apr. 13, 2026

But I woke up in the middle of the night with a terrible ache coming from behind my left knee.

From "Ida B" by Katherine Hannigan