octane

noun

oc·​tane ˈäk-ˌtān How to pronounce octane (audio)
1
: any of several isomeric liquid alkanes C8H18
2

Examples of octane in a Sentence

an octane rating of 90
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.
Storrie is a shoe-in for the high octane, über slick universe that designer Anthony Vaccarello has built at Saint Laurent. José Criales-Unzueta, Vanity Fair, 27 Jan. 2026 Common passenger cars like the Honda Civic and Toyota Camry have no use for a higher octane fuel. Charles Singh, USA Today, 27 Jan. 2026 Very high octane, really good movement on his four-seamer and two-seamer. CBS News, 22 Jan. 2026 Federer-Ruud was low-octane even by the standards of a practice, limiting rallies of any intensity to the final few minutes. Owen Lewis, New York Times, 16 Jan. 2026 Required means the engine was designed around higher octane. Chris Hardesty, AJC.com, 16 Jan. 2026 From understated, plastic chair haunts that lure in the foodie pilgrims to high octane, theatrical affairs that elevate the island’s enviable produce to alchemical heights, here are the best restaurants in Sicily. Rosalyn Wikeley, Condé Nast Traveler, 12 Jan. 2026 But Minnesota’s offense continues to hum at a high octane when Randle is in full control of the show. Jace Frederick, Twin Cities, 2 Dec. 2025 Wolf’s raw vocal serves as the intro to the track, which erupts into a high octane rage-rap single that also features Yeat. Mackenzie Cummings-Grady, Billboard, 11 Nov. 2025

Word History

Etymology

International Scientific Vocabulary

First Known Use

1867, in the meaning defined at sense 1

Time Traveler
The first known use of octane was in 1867

Browse Nearby Words

Cite this Entry

“Octane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octane. Accessed 31 Jan. 2026.

Kids Definition

octane

noun
oc·​tane ˈäk-ˌtān How to pronounce octane (audio)
1
: any of several liquid chemical compounds containing 8 carbon atoms and 18 hydrogen atoms
2
: a number that is used to measure the antiknock characteristics of gasoline with a higher number indicating a smaller chance of knocking

More from Merriam-Webster on octane

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