We found 6 dictionaries that define the word beta tests:

General (4 matching dictionaries)

1. beta tests: Merriam-Webster
2. beta-tests, beta-tests: Collins English Dictionary
3. beta tests: Vocabulary.com
4. beta-tests, beta tests: TheFreeDictionary.com

Computing (1 matching dictionary)

5. beta-tests, beta tests: Encyclopedia

Medicine (1 matching dictionary)

6. online medical dictionary (No longer online)

(Note: See beta_test as well.)

Definitions from Wiktionary (beta test) ▸ noun:  A process of beta testing. ▸ Also see beta_test ▸ Words similar to beta tests ▸ Usage examples for beta tests ▸ Idioms related to beta tests ▸ Wikipedia articles (New!) ▸ Words that often appear near beta tests ▸ Rhymes of beta tests ▸ Invented words related to beta tests