lobe
Americannoun
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any rounded projection forming part of a larger structure
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any of the subdivisions of a bodily organ or part, delineated by shape or connective tissue
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short for ear lobe
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any of the loops that form part of the graphic representation in cylindrical coordinates of the radiation pattern of a transmitting aerial Compare radiation pattern
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any of the parts, not entirely separate from each other, into which a flattened plant part, such as a leaf, is divided
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A rounded projection, as on a leaf or petal. The leaves of many oak species have prominent lobes.
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An anatomical division of an organ of the body. The liver, lungs, and brain are all characterized by lobes that are held in place by connective tissue.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of lobe
1515–25; < Medieval Latin lobus ( Late Latin: hull, husk, pod) < Greek lobós, akin to Latin legula lobe of the ear
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:
Barbara Sahakian, a neuropsychologist at the University of Cambridge who specialises in ADHD, said the condition affects the brain's frontal lobe, which play a key role in organisation and focus.
From BBC ● Mar. 25, 2026
However, the widely repeated claim that brain development, especially in the frontal lobe, stops at 25 is not accurate.
From Science Daily ● Feb. 19, 2026
“I think there’s something to be said for frontal lobe development,” she says.
From Los Angeles Times ● Jan. 25, 2026
In typical cases, the exposure damages the brain’s frontal lobe, which slows cognition, impairs impulse control, restricts dopamine production and affects mood.
From The Wall Street Journal ● Dec. 22, 2025
He had a habit of pulling at the lobe of his right ear, rubbing his nose, or digging at the wiry whiskers on his chin.
From "Summer of the Monkeys" by Wilson Rawls
Earth-based observations had already hinted that Donaldjohanson was elongated, but Lucy showed that the asteroid is actually composed of two connected lobes joined by a narrow neck.
From Science Daily ● Jun. 25, 2026
Fabbri notes that pterosaurs also had enlarged optic lobes.
From Science Daily ● Dec. 9, 2025
Procedures such as the repair of split ear lobes, fixing simple snoring and the reversal of male and female sterilisation are not permitted.
From BBC ● Oct. 8, 2025
In FTD, abnormal proteins accumulate in the brain’s frontal or temporal lobes, damaging and eventually destroying those neurons.
From Los Angeles Times ● Sep. 7, 2025
Her ears were very little, without lobes, and they pressed so close to her head that even with her hair combed up they made no silhouette.
From "East of Eden" by John Steinbeck
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
