We found 20 dictionaries that define the word in case:

General (14 matching dictionaries)

1. in case: Merriam-Webster
2. in case: Oxford Learner's Dictionaries
3. in case: Collins English Dictionary
4. in case: Vocabulary.com
5. in-case: Wordnik
6. (just) in case: Cambridge Advanced Learner's Dictionary
7. in case: Wiktionary
8. In case, in case: Dictionary.com
9. in case: Rhymezone
10. in case: FreeDictionary.org
11. in case: Mnemonic Dictionary
12. in case: TheFreeDictionary.com

Business (2 matching dictionaries)

13. in case: Merriam-Webster Legal Dictionary
14. in case: Legal dictionary

Computing (1 matching dictionary)

15. in case: Encyclopedia

Medicine (2 matching dictionaries)

16. in case: Merriam-Webster Medical Dictionary
17. in case: Medical dictionary

Miscellaneous (1 matching dictionary)

18. in case: Idioms

(Note: See in_cases as well.)

Definitions from WordNet (in case) ▸ adverb:  if there happens to be need ("In case of trouble call 911") Phrases: in any case, just in case, in one case, in case of, in that case, more... ▸ Words similar to in case ▸ Usage examples for in case ▸ Idioms related to in case ▸ Wikipedia articles (New!) ▸ Words that often appear near in case ▸ Rhymes of in case ▸ Invented words related to in case