We found 15 dictionaries that define the word concussed:

General (10 matching dictionaries)

1. concussed: Merriam-Webster
2. concussed: Collins English Dictionary
3. concussed: Vocabulary.com
4. concussed: Wordnik
5. concussed: Cambridge Advanced Learner's Dictionary
6. concussed: Wiktionary
7. concussed: Dictionary.com
8. concussed: TheFreeDictionary.com

Business (1 matching dictionary)

9. concussed: Legal dictionary

Computing (1 matching dictionary)

10. concussed: Encyclopedia

Medicine (2 matching dictionaries)

11. concussed: Merriam-Webster Medical Dictionary
12. concussed: Medical dictionary

Slang (1 matching dictionary)

13. concussed: Urban Dictionary

(Note: See concuss as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Knocked out; temporarily confused or unconscious due to a blow to the head. Similar: contused, discombobulated, confounded, addled, betwattled, kerflummoxed, amated, befuddled, stumped, verklempt, more... Opposite: unconcussed, clear-headed, alert, unaffected ▸ Words similar to concussed ▸ Usage examples for concussed ▸ Idioms related to concussed ▸ Wikipedia articles (New!) ▸ Popular nouns described by concussed ▸ Words that often appear near concussed ▸ Rhymes of concussed ▸ Invented words related to concussed