frontal lobe

noun

: the anterior division of each cerebral hemisphere

Examples of frontal lobe in a Sentence

Recent Examples on the Web
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All three of them are on the side of the left frontal lobe. Quanta Magazine, 5 Dec. 2025 The diagnosis of frontotemporal dementia, a brain disorder caused by degeneration of the brain's frontal lobe, comes nearly a year after Willis' family confirmed the movie icon, now 67, was stepping away from acting due to an aphasia diagnosis. Edward Segarra, USA Today, 28 Nov. 2025 It’s most strongly associated with the brain’s frontal lobes. Sam Manzella, Flow Space, 19 Nov. 2025 Moniz injected absolute alcohol into the frontal lobes of a mental patient through two holes drilled in the skull. Scott Lafee, San Diego Union-Tribune, 11 Nov. 2025 See All Example Sentences for frontal lobe

Word History

First Known Use

1827, in the meaning defined above

Time Traveler
The first known use of frontal lobe was in 1827

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Cite this Entry

“Frontal lobe.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/frontal%20lobe. Accessed 16 Dec. 2025.

Medical Definition

frontal lobe

noun
: the anterior division of each cerebral hemisphere having its lower part in the anterior fossa of the skull and bordered behind by the central sulcus

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