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 premium fuel that's better for a car's engine, or to describe anything particularly strong or powerful, like your dad's high-octane coffee that wakes him up in the morning. Different kinds of fuel have different octane numbers or ratings. The higher this number is, the better the fuel withstands being compressed in an engine, without pockets of air causing it to burn unevenly and cause a metallic knocking sound. High-octane describes good fuel, but it's also come to mean "supercharged" or "energetic." A high-octane play on the football field is thrilling to watch, and a high-octane movie will keep you on the edge of you 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.
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
This is the frontier of esports-style live trading competitions, a high-octane subculture that feels like an underground rave.
From The Wall Street Journal • May 13, 2026
Perhaps you might want to time-travel to Eve Babitz’s glamorous and gritty Los Angeles, or bite into a high-octane thriller.
From Los Angeles Times • May 12, 2026
The fire damaged two units producing high-octane fuel at the refinery, which accounts for 10% of Australia’s fuel supply.
From The Wall Street Journal • Apr. 16, 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.
