traumatic brain injury

noun

: an acquired brain injury caused by external force (such as a blow to the head sustained in a motor vehicle accident or fall or shrapnel or a bullet entering through the skull)

Traumatic brain injury occurs when the shock from an explosion damages neurological fibers. Soldiers may survive a blast with scarcely a cut, only to find over time that they suffer coordination and memory loss, dizziness, insomnia.

—Nancy Gibbs

An unprotected fall, especially if the player is unconscious or his opponent lands on top of him, can result in severe traumatic brain injury.

—Michael J. Stuart et al.

broadly : acquired brain injury

—abbreviation TBI

Examples of traumatic brain injury in a Sentence

Recent Examples on the Web

Then she was hit by a car, which left her with a traumatic brain injury. —Daniel Yadin, Curbed, 11 Feb. 2026

Retired player Dan Carcillo, who has been open about his history of traumatic brain injuries and opened Experience Onward, a psilocybin treatment center in Oregon, got better only after saying the death of close friend and former hockey player Steve Montador saved his life. —Stephen Whyno, Twin Cities, 10 Feb. 2026

Though his bruises have faded, the effects of his traumatic brain injuries linger. —Jack Brook, Los Angeles Times, 8 Feb. 2026

The Department of Veterans Affairs has shown that access to firearms is associated with suicide, particularly for those with traumatic brain injury. —Eleanor M. Perfetto, STAT, 7 Feb. 2026

Word History

First Known Use

1931, in the meaning defined above

Medical Definition

traumatic brain injury

noun

: an acquired brain injury caused by external force (as a blow to the head sustained in a motor vehicle accident or fall or shrapnel or a bullet entering through the skull)

A soldier—or a civilian—can survive the blast without a single penetrating wound and still receive the worst diagnosis: traumatic brain injury, or TBI, the signature injury of the Iraq War.

—Michael Mason, Discover

An unprotected fall, especially if the player is unconscious or his opponent lands on top of him, can result in severe traumatic brain injury.

—Michael J. Stuart et al., USA Today

broadly : acquired brain injury

—abbreviation TBI