We found 39 dictionaries that define the word al's:

General (21 matching dictionaries)

1. ALS, -als: Merriam-Webster
2. ALS: Oxford Learner's Dictionaries
3. ALS: American Heritage Dictionary of the English Language
4. ALS: Collins English Dictionary
5. ALS: Vocabulary.com
6. AL's, ALs, Al's, Als, al's, als, als: Wordnik
7. ALS, ALs, al's, als: Wiktionary
8. ALS: Webster's New World College Dictionary, 4th Ed.
9. a.l.s: Infoplease Dictionary
10. ALS, a.l.s: Dictionary.com
11. A.L.S, ALS (disambiguation), ALS (disease), ALS, Als (island), Als: Wikipedia, the Free Encyclopedia
12. Als: Online Plain Text English Dictionary
13. als: Webster's Revised Unabridged, 1913 Edition
14. Als: Rhymezone
15. Als, als, als, als (im Vergleich): AllWords.com Multi-Lingual Dictionary
16. -als: MyWord.info
17. ALS, Als, als: Stammtisch Beau Fleuve Acronyms
18. als: FreeDictionary.org
19. als: Mnemonic Dictionary
20. ALS: TheFreeDictionary.com
21. ALS: Merriam-Webster

Art (1 matching dictionary)

22. als-: A Cross Reference of Latin and Greek Elements

Computing (1 matching dictionary)

23. ALS, Als (disambiguation): Encyclopedia

Medicine (10 matching dictionaries)

24. ALS: Merriam-Webster Medical Dictionary
25. Dorland's Illustrated Medical Dictionary (No longer online)
26. ALS: MedTerms.com Medical Dictionary
27. ALS (amyotrophic lateral sclerosis): Merck Manuals
28. online medical dictionary (No longer online)
29. Hepatitis C Information Central (No longer online)
30. Specific Diseases/Disorders (No longer online)
31. ALS, Als (disambiguation): Medical dictionary
32. University of Maryland Glossary of Medical Terms (No longer online)
33. ALS: Drug Medical Dictionary

Miscellaneous (4 matching dictionaries)

34. a.l.s, a.l.s, a.l.s, als, als, als: Terminology and Descriptions of Geneaological Words
35. ALS: Acronym Finder
36. ALS: Three Letter Words with definitions
37. AbbreviationZ (No longer online)

Science (1 matching dictionary)

38. ALS: A Dictionary of Quaternary Acronyms and Abbreviations

Slang (1 matching dictionary)

39. ALS: Urban Dictionary

(Note: See alsing as well.)

Definitions from WordNet (Alsing) ▸ name:  A surname (very rare: popularity rank in the U.S.: #88587) ▸ Also see alsing Similar: amyotrophic lateral sclerosis, Der, EIN, Aan, hier, een, uit, haben, hij, Sind, more... Phrases: familial als, als (disambiguation), peder als, Hilton Als, ALS Limited, more... Adjectives: familial, sporadic, human, net, bald, classic, typical, classical, perspektive, und, gross Colors:     red,     blue,     green,     yellow,     orange, more... ▸ Words similar to al's ▸ Usage examples for al's ▸ Idioms related to al's ▸ Wikipedia articles (New!) ▸ Words that often appear near al's ▸ Rhymes of al's ▸ Invented words related to al's