life-threatening
adjective
life-threat·en·ing
ˈlīf-ˌthre-tᵊn-iŋ 
-ˌthret-niŋ
: capable of causing death : potentially fatal
a life-threatening disease/condition
The injuries are serious but not life-threatening.
Examples of life-threatening in a Sentence
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Since more than 60% of severe reactions occur outside the safety of the home kitchen, this portable device could serve as a vital protective measure, providing an easy way to mitigate life-threatening risks in unpredictable environments.
—
Mrigakshi Dixit, Interesting Engineering, 6 Jan. 2026
But surviving a life-threatening health scare is really what makes owners Mario and Maya Palazon value the steady stream of customers coming through the door at their new FreshCo Fish Grill & Market in Downtown Doral.
—Miami Herald, 6 Jan. 2026
The meningococcal and hepatitis A and B vaccines also protect against serious and potentially life-threatening disease.
—Emily Kay Votruba, EverydayHealth.com, 6 Jan. 2026
Officers shot the suspect, described as a man in his 40s, who was hospitalized with life-threatening injuries, according to Santiago.
—Jose R. Gonzalez, AZCentral.com, 6 Jan. 2026
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Mrigakshi Dixit, Interesting Engineering, 6 Jan. 2026
But surviving a life-threatening health scare is really what makes owners Mario and Maya Palazon value the steady stream of customers coming through the door at their new FreshCo Fish Grill & Market in Downtown Doral.
—Miami Herald, 6 Jan. 2026
The meningococcal and hepatitis A and B vaccines also protect against serious and potentially life-threatening disease.
—Emily Kay Votruba, EverydayHealth.com, 6 Jan. 2026
Officers shot the suspect, described as a man in his 40s, who was hospitalized with life-threatening injuries, according to Santiago.
—Jose R. Gonzalez, AZCentral.com, 6 Jan. 2026
See All Example Sentences for life-threatening
Cite this Entry
“Life-threatening.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life-threatening. Accessed 8 Jan. 2026.
Copy CitationMedical Definition
life-threatening
adjective
life-threat·en·ing
ˈlīf-ˌthret-ən-iŋ
: capable of causing death : potentially fatal
life-threatening injuries
a life-threatening allergic reaction
life-threatening arrhythmia
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