adrenaline

noun

adren·​a·​line ə-ˈdre-nə-lən How to pronounce adrenaline (audio)
: epinephrine

Note: Adrenaline is used in both technical and nontechnical contexts. It is commonly used in describing the physiological symptoms (such as increased heart rate and respiration) that occur as part of the body's fight-or-flight response to stress, as when someone is in a dangerous, frightening, or highly competitive situation, as well as the feelings of heightened energy, excitement, strength, and alertness associated with those symptoms. In figurative use, it suggests a drug that provides something with a jolt of useful energy and stimulation.

He felt a rush of adrenaline as he parachuted from the airplane.
The fans were jubilant, raucous, their adrenaline running high.W. P. Kinsella
My reputation was as a single-day racer; show me the start line and I would win on adrenaline and anger, chopping off my competitors one by one.Lance Armstrong
London's summer antiques scene has been given a massive injection of adrenaline.Town and Country

Examples of adrenaline in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
His pregame playlists purposefully lowered his blood pressure instead of spiking his adrenaline. Brian Hamilton, New York Times, 17 Oct. 2025 Intense fear plus a shot of adrenaline create a potent drug. Jennifer Borresen, USA Today, 15 Oct. 2025 Recurring adrenaline rushes can weaken immune systems. Tom Krasovic, San Diego Union-Tribune, 15 Oct. 2025 Shop Swift’s Favorites Ahead, a closer look at every product Swift used to wash off all that Eras Tour glitter—and maybe to kick a little of the adrenaline, too. Christa Joanna Lee, Allure, 14 Oct. 2025 See All Example Sentences for adrenaline

Word History

First Known Use

1890, in the meaning defined above

Time Traveler
The first known use of adrenaline was in 1890

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Cite this Entry

“Adrenaline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/adrenaline. Accessed 22 Oct. 2025.

Kids Definition

adrenaline

noun
adren·​a·​line ə-ˈdren-ᵊl-ən How to pronounce adrenaline (audio)

Medical Definition

adrenaline

noun
adren·​a·​line ə-ˈdren-ᵊl-ən How to pronounce adrenaline (audio)
: epinephrine
recognized by the British Pharmaceutical Codex as the preferred name for epinephrine in Great Britain

More from Merriam-Webster on adrenaline

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