cerebrum
noun
ce·re·brum
sə-ˈrē-brəm 
ˈser-ə-brəm
ˈser-ə-brəm
ˈse-rə-
plural cerebrums or cerebra
sə-ˈrē-brə
ˈser-ə-brə,
ˈse-rə-
1
2
: an enlarged anterior or upper part of the brain
especially
: the expanded anterior portion of the brain that in higher mammals overlies the rest of the brain, consists of cerebral hemispheres and connecting structures, and is considered to be the seat of conscious mental processes : telencephalon
Examples of cerebrum in a Sentence
you'll need the patience of a saint and the cerebrum of a rocket scientist to figure out the solution to this brainteaser
Recent Examples on the Web
The cerebral arteries supply the cerebrum—the largest part of the brain, located above and in front of the brainstem.
—
Colleen Doherty, Verywell Health, 20 July 2025
While the Danionella cerebrum seems harmless now, the noises alone could be scary when heard in the wild.
—Scott Travers, Forbes, 19 Oct. 2024
The relative size of the bulb is perhaps greater than in any other carnivore, the paper says, but this may just be due to the smallness of the bear’s cerebrum (its central brain).
—Matt Hrodey, Discover Magazine, 22 June 2023
The cerebrum is the largest, comprising roughly 85 percent of the organ’s total weight.
—Scott Lafee, San Diego Union-Tribune, 13 June 2023
In addition to the amygdala, areas of the brain important for memory and attention—such as the cerebrum—also have testosterone receptors.
—Erica Sweeney, Men's Health, 1 Feb. 2023
According to Johns Hopkins Medicine, a stroke in the left hemisphere of the cerebrum can cause aphasia: difficulty finding the right words or understanding what others are saying, or both.
—Time, 13 Oct. 2022
Much of the growth was in the neocortex, a sublime region of the cerebrum involved in higher cognition and sensory integration.
—Steve Brusatte, Scientific American, 1 June 2022
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Colleen Doherty, Verywell Health, 20 July 2025
While the Danionella cerebrum seems harmless now, the noises alone could be scary when heard in the wild.
—Scott Travers, Forbes, 19 Oct. 2024
The relative size of the bulb is perhaps greater than in any other carnivore, the paper says, but this may just be due to the smallness of the bear’s cerebrum (its central brain).
—Matt Hrodey, Discover Magazine, 22 June 2023
The cerebrum is the largest, comprising roughly 85 percent of the organ’s total weight.
—Scott Lafee, San Diego Union-Tribune, 13 June 2023
In addition to the amygdala, areas of the brain important for memory and attention—such as the cerebrum—also have testosterone receptors.
—Erica Sweeney, Men's Health, 1 Feb. 2023
According to Johns Hopkins Medicine, a stroke in the left hemisphere of the cerebrum can cause aphasia: difficulty finding the right words or understanding what others are saying, or both.
—Time, 13 Oct. 2022
Much of the growth was in the neocortex, a sublime region of the cerebrum involved in higher cognition and sensory integration.
—Steve Brusatte, Scientific American, 1 June 2022
Cite this Entry
“Cerebrum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cerebrum. Accessed 3 Nov. 2025.
Copy CitationKids Definition
cerebrum
noun
ce·re·brum
sə-ˈrē-brəm
ˈser-ə-brəm
ˈser-ə-brəm
plural cerebrums or cerebra
-brə
2
: the expanded front or upper part of the brain that consists of the cerebral hemispheres and connecting structures and is reported to be the seat of conscious mental processes
Medical Definition
cerebrum
noun
ce·re·brum
sə-ˈrē-brəm
ˈser-ə-brəm
ˈser-ə-brəm
plural cerebrums or cerebra
-brə
1
2
: an enlarged anterior or upper part of the brain
especially
: the expanded anterior portion of the brain that in higher mammals overlies the rest of the brain, consists of cerebral hemispheres and connecting structures, and is considered to be the seat of conscious mental processes : telencephalon
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