variants: or costeen \ käˈstēn , ˈ⸗ˌ⸗ \

Definition of costean

: to dig trenches or small pits through the surface soil or debris to the underlying rock in place for the purpose of exposing the outcrop of a mineral deposit and determining its course

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!

History and Etymology for costean

from (assumed) Cornish costēn, probably from codha to fall, happen + stēn tin; akin to Old Norse hitta to hit, find

Keep scrolling for more

Learn More about costean

Statistics for costean

Look-up Popularity

Comments on costean

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


the perfect form or example of something

Get Word of the Day daily email!

Test Your Vocabulary

Valentine's Day Quiz

  • happy-valentines-day
  • Which word used to mean sweetheart or darling?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

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!