Definition of ALS

1 advanced life support an EMT with ALS training
2 amyotrophic lateral sclerosis
3 autographed letter signed

Learn More About ALS

Dictionary Entries Near ALS

al rovescio

ALS

Alsace

See More Nearby Entries 

Statistics for ALS

Cite this Entry

“ALS.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ALS. Accessed 25 May. 2022.

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

More Definitions for ALS

ALS

abbreviation

Medical Definition of ALS

1 advanced life support
2 amyotrophic lateral sclerosis
3 antilymphocyte serum; antilymphocytic serum

WORD OF THE DAY

Test Your Vocabulary

Name That Color

  • a light greenish blue color
  • Name that color:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

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