Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

ALS

abbreviation

Definition of ALS

  1. 1 amyotrophic lateral sclerosis

  2. 2 autographed letter signed




Medical Dictionary

ALS

abbreviation

Medical Definition of ALS

  1. 1advanced life support

  2. 2amyotrophic lateral sclerosis

  3. 3antilymphocyte serum; antilymphocytic serum




Learn More about als

  1. Medical Dictionary: Definition of "ALS" Britannica.com: Encyclopedia article about "ALS"


Seen and Heard

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

WORD OF THE DAY

to dishevel or rumple

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

perplex soothe reduce disapprove
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ