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.
The original dress originates from The Blonds’s spring summer 2009 collection, one that delighted in futuristic, high octane glamour that the New York design duo defined. Anna Cafolla, Vogue, 1 Oct. 2025 Common passenger cars like the Honda Civic and Toyota Camry have no use for a higher octane fuel. Charles Singh, Nashville Tennessean, 23 Sep. 2025 As the night of high octane weirdness escalates out of control, the teenagers find their only hope is to recruit a team of unlikely heroes to battle the demon and restore balance to the universe. Andreas Wiseman, Deadline, 20 June 2025 There was Melanie, a young woman of high octane who whirred all evening about the bar, flinging her head back momently and quaking with Pagliaccian laughter. Andrew Kay, Harpers Magazine, 28 May 2025 Lopez has been spending a lot of time in New York lately, and her outfits have ranged from casual and comfortable looks to the highest octane slays, and sometimes even both at the same time. Aamina Inayat Khan, StyleCaster, 17 Apr. 2025 Written and directed by Tina Landau, Redwood tells the story of Jesse, who after suffering a devastating trauma, escapes her high octane life in New York in search of some kind of salve. Jeryl Brunner, Forbes, 18 Mar. 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 12 Oct. 2025.

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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