: designed to run on either traditional gasoline or a gasoline/alcohol blend (such as gasohol)
In the past few years, Brazil's bioethanol industry has sprouted new wings thanks to higher petrol prices and 'flex-fuel' cars, which can sense different mixtures of petrol and ethanol and adjust their workings accordingly. Emma Marris

Word History

First Known Use

1987, in the meaning defined above

Time Traveler
The first known use of flex-fuel was in 1987

Dictionary Entries Near flex-fuel

Cite this Entry

“Flex-fuel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flex-fuel. Accessed 30 Nov. 2022.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ