We found 31 dictionaries that define the word cold sore:

General (19 matching dictionaries)

1. cold sore: Merriam-Webster
2. cold sore: Oxford Learner's Dictionaries
3. cold sore: American Heritage Dictionary of the English Language
4. cold sore: Collins English Dictionary
5. cold sore: Vocabulary.com
6. cold-sore, cold sore: Wordnik
7. cold sore: Cambridge Advanced Learner's Dictionary
8. cold sore: Wiktionary
9. cold sore: The Wordsmyth English Dictionary-Thesaurus
10. cold sore: Infoplease Dictionary
11. cold sore: Dictionary.com
12. Cold sore: Wikipedia, the Free Encyclopedia
13. cold sore: Rhymezone
14. cold sore: FreeDictionary.org
15. cold sore: Mnemonic Dictionary
16. cold sore: TheFreeDictionary.com
17. cold sore: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

18. cold sore: Legal dictionary

Computing (1 matching dictionary)

19. cold sore: Encyclopedia

Medicine (9 matching dictionaries)

20. cold sore: Merriam-Webster Medical Dictionary
21. Cold sore, Sore, cold: MedTerms.com Medical Dictionary
22. online medical dictionary (No longer online)
23. Hair Facts (No longer online)
24. Specific Diseases/Disorders (No longer online)
25. A-Z Family health glossary (No longer online)
26. cold sore, sore, cold: Medical dictionary
27. University of Maryland Glossary of Medical Terms (No longer online)
28. Cold sore, Sore, cold: Drug Medical Dictionary

Slang (1 matching dictionary)

29. cold sore: Urban Dictionary

(Note: See cold_sores as well.)

Definitions from Wiktionary (cold sore) ▸ noun:  (pathology) A small bump (namely a vesicle) on the lips resulting from infection by herpes simplex viruses (mostly HHV1 but also HHV2). Similar: fever blister, Herpes labialis, oral herpes, herpes simplex, molluscum contagiosum, herpes, herpangina, condyloma, common cold, roseola, more... Adjectives: paratyphoid, typhogenic, leprostatic, cold, varicelliform, poxy, breakbone, syphilitic, morbilliform, rash, quintan ▸ Words similar to cold sore ▸ Usage examples for cold sore ▸ Idioms related to cold sore ▸ Wikipedia articles (New!) ▸ Words that often appear near cold sore ▸ Rhymes of cold sore ▸ Invented words related to cold sore