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.
Your heart beats faster, adrenaline is released and the most reptilian part of your brain takes over your the executive functioning of your brain. Janice Marturano, Forbes.com, 29 Apr. 2025 The ability to walk or take the streetcar from home or work to at least 81 home games each year, providing more adrenaline to Kansas City’s urban energy. Eric Adler, Kansas City Star, 26 Apr. 2025 The punch was great, the perfect way to release all that adrenaline after such an exhilarating surgery. Ryan Schwartz, TVLine, 24 Apr. 2025 Full of adrenaline, most of the women were moved to tears in interviews after landing. Michael Verdon, Robb Report, 14 Apr. 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 2 May. 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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