high-octane
Americanadjective
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noting a gasoline with a relatively high octane number, characterized by high efficiency and freedom from knock.
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Informal. forceful or intense; dynamic; high-powered.
high-octane efforts to obliterate the competition.
adjective
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(of petrol) having a high octane number
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informal dynamic, forceful, or intense
high-octane drive and efficiency
Etymology
Origin of high-octane
First recorded in 1930–35
Explanation
Use the adjective high-octane for fuel that's resistant to abnormal combustion in an engine. You can also use it to describe anything particularly intense or high-energy, like your dad's high-octane coffee that wakes him up in the morning. Different kinds of gasoline have different octane ratings. The higher the number, the better the fuel withstands being compressed inside an engine without auto-igniting prematurely and causing a damaging metallic "knocking." High-octane fuel isn't inherently cleaner or more powerful — but it is required for certain high-performance cars to run smoothly. Figuratively, high-octane has come to mean "high-energy" or "thrilling." A high-octane football game is exciting to watch, and a high-octane movie will keep you on the edge of your seat.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“I was born and raised — lived my entire life — in the Dominican Republic,” said Tokischa, just after her high-octane performance.
From Los Angeles Times ● Aug. 4, 2026
In Busan, alongside a vast fandom, she screamed, jumped and sang at the top of her lungs, especially for her old favourites, the high-octane Fire and hip-hop hit Mic Drop.
From BBC ● Jul. 17, 2026
Building on the creative strides of “Hackney Diamonds,” their 24th studio effort, “Foreign Tongues” oozes with soulful R&B and high-octane rock.
From Salon ● Jul. 13, 2026
The US ambassador to India, Sergio Gor, a high-octane former aide to President Donald Trump, smiled and eagerly joined some of the couple's pictures.
From Barron's ● May 25, 2026
We were now to live careful, yellow lives rather than the high-octane orange ones we’d been leading.
From "Anthem of a Reluctant Prophet" by Joanne Proulx
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
