1665, in the meaning defined above
“Coal measures.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coal%20measures. Accessed 28 Nov. 2022.
Britannica.com: Encyclopedia article about coal measures
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!
Words Named After People
Test your knowledge - and maybe learn something along the way.
A daily challenge for crossword fanatics.
When each letter can be seen but not heard
Some may be more useful than others.
One L or two?
Look up any year to find out
How to use a word that (literally) drives some pe...
Or both? Or neither?
Editor Emily Brewster clarifies the difference.
An old-fashioned rule we can no longer put up with.
See if you can tell the insults from the complime...
Take the quiz
20 questions to help you score 1600
Test your knowledge - and maybe learn something a...
Can you outdo past winners of the National Spelli...