What's Trending Now
More Trending Words
acid fog
noun
Definition of acid fog
: fog having increased acidity caused by environmental factors (such as atmospheric pollutants) Even so, a combination of acid fog and ozone may have made trees on this and other Eastern summits more vulnerable to bugs, weather, and drought. — Edmund Faltermayer, Fortune, 17 July 1989
Read the Latest from M-W
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
First Known Use of acid fog
1878
Seen and Heard
What made you want to look up acid fog? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!