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
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.
What he did and how he did it is still in the frontal lobe of those who watched and those who wrote and broadcast about him.
From Los Angeles Times • Apr. 19, 2026
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
The results showed that areas within the frontal lobe mature gradually from the back toward the front.
From Science Daily • Feb. 19, 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
When the researchers scanned the subjects’ brains, they discovered that this tiny fraction of people seemed to have less activity going on in key portions of the frontal lobe.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
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.
