Dictionary
Thesaurus
Medical
Scrabble®
Spanish Central
Browse DictionaryBrowse Thesaurus
Get our free apps!iPhone•iPad•Android
Games
Word of the Day
Video
Blog: Words at Play
My Faves
Dictionary

dos

Definition of DOS

plural of 2do

Variants of DOS

dos or do's
ADVERTISEMENT

DOS

abbreviation

Definition of DOS

disk operating system
Medical Dictionary

dos

abbreviation

Medical Definition of DOS

dosage

Learn More About DOS

Browse

18 ENTRIES FOUND:
  1. dos
  2. do
  3. dos-à-dos
  4. dos gris
  5. dos nominata
  6. dos rationabilis
  7. Dos Passos
  8. Lagoa dos Patos
  9. Patos, Lagoa dos
  10. derring-do
  11. doo-doo
  12. do-sa-do
  13. do-si-do
  14. how-do-you-do
  15. make-do
  16. tae kwon do
  17. to-do
  18. whoop-de-do
Next Word in the Dictionary: do–sa–doPrevious Word in the Dictionary: dory trawlerAll Words Near: dos
ADVERTISEMENT
10 Charming Words for Nasty People
Put-downs with flair
Learn More
When "Literally" isn't, well, literal
How to use a word that (literally) drives some people nuts.
Watch Now
Know what this is?
Test your vocab with our fun, fast game
Go Play
Fear of cats?
Ailurophobia, and 9 other unusual fears
Learn More
Join Us
Merriam-Webster
on Facebook
Merriam-Webster
on Twitter
Bookstore: Digital and Print
Merriam-Webster references for Mobile, Kindle, print, and more.
See All
Other Merriam-Webster Dictionaries