fly ash


Definition of fly ash

: fine solid particles of ashes, dust, and soot carried out from burning fuel (such as coal or oil) by the draft

Examples of fly ash in a Sentence

Recent Examples on the Web

Concrete and coal fly ash aren't typically grouped together, but the both represent severe environmental problems. David Grossman, Popular Mechanics, "Scientists Make Concrete With Trash Instead of Cement," 12 July 2018 The kitchen countertops are Squak Mountain Stone, a material made of cement, fly ash, glass dust and paper. Julie Lasky, New York Times, "$450,000 Homes in Massachusetts, Oklahoma and Wisconsin," 1 Nov. 2017 There was danger in the fly ash, or the powderlike particles produced when burning coal, dirtying the air. Sarah Bowman, Indianapolis Star, "These toxic coal pits are leaking into Indiana’s water," 24 Sep. 2017

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

See More

First Known Use of fly ash

1931, in the meaning defined above

Keep scrolling for more

Learn More about fly ash

Statistics for fly ash

Look-up Popularity

Time Traveler for fly ash

The first known use of fly ash was in 1931

See more words from the same year

More from Merriam-Webster on fly ash

Rhyming Dictionary: Words that rhyme with fly ash Encyclopedia article about fly ash

Comments on fly ash

What made you want to look up fly ash? Please tell us where you read or heard it (including the quote, if possible).


not constant or steady

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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