Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “octane number”

See all translations

octane number

noun [C] uk   ( also octane rating) us  
a number showing the quality of petrol by representing how well and with how much power it can make an engine work
Translations of “octane number”
in Chinese (Traditional) 辛烷值…
in Chinese (Simplified) 辛烷值…
(Definition of octane number from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of octane number?
Add Cambridge dictionaries to your browser to your website

Word of the Day

illusion

an idea or belief that is not true

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More