black ash

noun (1)

Definition of black ash

 (Entry 1 of 2)

1 : a North American ash (Fraxinus nigra) having dark brown heavy wood

called also basket ash, brown ash, hoop ash

2 : an Australian eucalyptus (Eucalyptus stellulata)
3 : box elder

black ash

noun (2)

Definition of black ash (Entry 2 of 2)

1 : any of various dark-colored crude products obtained in industrial processes: such as
a : crude sodium carbonate obtained in the Leblanc process
b : crude barium sulfide
2 : a black mass containing chiefly soda in the form of sodium carbonate and usually also sodium sulfide with some carbon and produced especially for recovery of its soda content by concentrating and burning black liquor (see black liquor sense 2) in rotary furnaces

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 black ash

Noun (1)

ash (tree)

Noun (2)

ash (combustion product)

Learn More About black ash

Dictionary Entries Near black ash

black art

black ash


See More Nearby Entries 

Statistics for black ash

Cite this Entry

“Black ash.” Dictionary, Merriam-Webster, Accessed 23 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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