oc·​tane | \ ˈäk-ˌtān How to pronounce octane (audio) \

Definition of octane

1 : any of several isomeric liquid alkanes C8H18

Examples of octane in a Sentence

an octane rating of 90

Recent Examples on the Web

Eighty octane gas rose by nearly 22 %, from 5.5 to 6.75 Egyptian pounds per liter. Washington Post, "Egypt hikes fuel prices by up to 22 %," 5 July 2019 That team became the league's most popular based on a mix of flair and high-octane offense. Scott Gleeson, USA TODAY, "Six reasons Zion Williamson, New Orleans Pelicans will be NBA's most exciting show," 21 June 2019 Legally Blonde’’) match up well with the high-octane music by Jeff Richmond (Fey’s husband). Don Aucoin, BostonGlobe.com, "Broadway beckons with ‘SpongeBob,’ ‘Mean Girls,’ and ‘Frozen’," 12 Apr. 2018 Even the grades may have different octane ratings depending on location. Bob Weber, chicagotribune.com, "Gas mileage varies based on octane, geography," 1 July 2017 On a team known for its stoic execution — for the steel-handed discipline to Jay Wright’s close-to-the-vest system — DiVincenzo is a highly emotional, high-octane wild card. Marcus Hayes, Philly.com, "Villanova's Donte DiVincenzo is NCAA championship game star with record 31 points | Marcus Hayes," 2 Apr. 2018 Two jacked-up, engine-roaring, high-octane machines, chained together and going full throttle in opposite directions. Rich Pope, OrlandoSentinel.com, "Trucks Gone Wild predict Super Bowl winner with a Mega Truck tug-of-war," 31 Jan. 2018 Higher-octane businesses such as securities trading are less lucrative and less valued by shareholders, who instead want steadier, subscription-like businesses that will do well in hot markets and cold. Liz Hoffman, WSJ, "Morgan Stanley, in Its Biggest Deal Since Crisis, Courts Future Millionaires," 11 Feb. 2019 Surprisingly funny plot knows its place in this high-octane game—and enjoys a stellar voice cast. Sam Machkovech, Ars Technica, "Sunset Overdrive review: Ride the rails to kaboom-town (finally on PCs, too)," 17 Nov. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'octane.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of octane

1867, in the meaning defined at sense 1

History and Etymology for octane

International Scientific Vocabulary

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Statistics for octane

Last Updated

15 Jul 2019

Look-up Popularity

Time Traveler for octane

The first known use of octane was in 1867

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English Language Learners Definition of octane

: a chemical in petroleum that is used to rate the quality of different kinds of gasoline

More from Merriam-Webster on octane

Rhyming Dictionary: Words that rhyme with octane

Britannica.com: Encyclopedia article about octane

Comments on octane

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something desired as essential

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