knob
Americannoun
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knobs
plural
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a projecting part, usually rounded, forming the handle of a door, drawer, or the like.
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a rounded lump or protuberance on the surface or at the end of something, as a knot on a tree trunk.
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Architecture. an ornamental boss, as of carved work.
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a rounded hill, mountain, or elevation on a ridge.
verb (used with object)
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to produce a knob on.
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to furnish with a knob.
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(in stone cutting) to knock off (excess stone) preparatory to dressing; knobble; skiffle.
noun
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a rounded projection from a surface, such as a lump on a tree trunk
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a handle of a door, drawer, etc, esp one that is rounded
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a round hill or knoll or morainic ridge
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taboo a slang word for penis
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informal the same to you but even more so
verb
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(tr) to supply or ornament with knobs
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(intr) to form into a knob; bulge
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taboo to have sexual intercourse with (someone)
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of knob
1350–1400; Middle English knobbe < Middle Low German
Explanation
You can use the word knob for any bump or bulge, like the egg-shaped knob on your head after you bumped it on the door knob. Along the same likes as a bulging lump or protuberance, a knob is also a handle that juts out and is round shaped. The knobs on your dresser might be glass or porcelain, while the knobs on your kitchen cabinets could be made of chrome. There are also the knobs, or controls, on your old fashioned TV or radio, and the knob that's basically a lump or hunk, like a knob of butter.
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:
"This gives us a completely new tuning knob for light. By adjusting its topology, we can decide how and where chirality appears," said Dr. Nape.
From Science Daily ● Oct. 13, 2026
The shorter man jerked the knob, but the safe didn’t open.
From Slate ● Sep. 17, 2026
You can think of this threshold as settings on a control knob.
From Salon ● May 12, 2026
"This means that phosphate scarcity is the primary control knob for methane production and emissions in the open ocean," Weber says.
From Science Daily ● Apr. 16, 2026
Taking a deep breath, I turned the knob slowly and pushed the bedroom door open.
From "The Old Willis Place" by Mary Downing Hahn
The analysis revealed that these genetic "volume knobs" were already present in Neanderthals and may have been even slightly more pronounced than they are in modern humans.
From Science Daily ● Jun. 12, 2026
For the hardware, the couple will be replacing the existing silver-toned metal with gold, including new faucets, new drawer handles, and new knobs for the cupboards.
From MarketWatch ● Apr. 8, 2026
Giggles echoed in a nearby play area where children twisted knobs and spun a wheel in a car-like play structure.
From Los Angeles Times ● Mar. 3, 2026
Neither did Mazda abandon conventional switches, rotary knobs and paddles even as other companies were converting to capacitive and haptic controls.
From The Wall Street Journal ● Feb. 27, 2026
“But most of us, I am sure, ‘fiddled with the knobs.’
From "Hitler Youth: Growing Up in Hitler's Shadow" by Susan Campbell Bartoletti
You’ll discover the fancifully striped Red St. Lawrence from Maine, the sleek Arkansas Black, the ruby Hidden Rose from Oregon, the pearly Yellow Transparent from Russia and several tortured knobbed russets from Sussex, England.
From New York Times ● Oct. 4, 2021
The knobbed Schwalbes are surprisingly quiet on city roads while offering decent grip on trails — but not as much as you’d get from proper mountain bike tires.
From The Verge ● May 17, 2019
The knobbed ends keep flopping over, needing frequent fixing.
From Seattle Times ● Dec. 9, 2016
Vanessa Torres isn't intimidated by knobbed rails or stylish headgear.
From Time Magazine Archive
Her legs were bent, with great knobbed joints high above her back, and hairs that stuck out like steel spines, and at each leg’s end there was a claw.
From "The Two Towers" by J. R. R. Tolkien
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
