We found 25 dictionaries that define the word K2:

General (18 matching dictionaries)

1. K2: Merriam-Webster
2. K2: Oxford Learner's Dictionaries
3. K2: American Heritage Dictionary of the English Language
4. K2: Collins English Dictionary
5. K2: Vocabulary.com
6. K2: Wordnik
7. K2: Wiktionary
8. K2: Webster's New World College Dictionary, 4th Ed.
9. K2: The Wordsmyth English Dictionary-Thesaurus
10. K2: Infoplease Dictionary
11. k2: Dictionary.com
12. K2 (Airbase), K2 (South African band), K2 (TV channel), K2 (TV network), K2 (TV series), K2 (building), K2 (disambiguation), K2 (drug), K2 (film), K2 (mountain), K2 (play), K2 (tax scheme), K2, The K2: Wikipedia, the Free Encyclopedia
13. K2: Rhymezone
14. K2: Stammtisch Beau Fleuve Acronyms
15. k2: FreeDictionary.org
16. k2: Mnemonic Dictionary
17. K2: TheFreeDictionary.com
18. k2: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

19. K2 (mountain), K2: Encyclopedia

Miscellaneous (1 matching dictionary)

20. K2: Acronym Finder

Science (2 matching dictionaries)

21. Archaeology Wordsmith (No longer online)
22. K2: Cytokines & Cells Online Pathfinder Encyclopaedia

Slang (3 matching dictionaries)

23. K2: Green’s Dictionary of Slang
24. K2: A Seattle Lexicon
25. k2: Urban Dictionary

Definitions from WordNet (K2) ▸ noun:  a mountain peak in the Karakoram Range in northern Kashmir; the 2nd highest peak in the world (28,250 feet high) Similar: godwin austen, peak, arete, Asia, carnotite, climb, col, dapsang, Everest, glauconite, more... Opposite: Everest, Annapurna, Makalu, Cho Oyu, Lhotse Phrases: vitamin K2, vitamin k k2, K2 Black Panther, 2008 K2 disaster, The K2, more... ▸ Words similar to K2 ▸ Usage examples for K2 ▸ Idioms related to K2 ▸ Wikipedia articles (New!) ▸ Popular adjectives describing K2 ▸ Words that often appear near K2 ▸ Rhymes of K2 ▸ Invented words related to K2