We found 7 dictionaries that define the word user base:

General (4 matching dictionaries)

1. user-base: Wordnik
2. user base: Dictionary.com

Computing (2 matching dictionaries)

3. user base: Free On-line Dictionary of Computing
4. user base: Encyclopedia

Medicine (1 matching dictionary)

5. online medical dictionary (No longer online)

Phrases: installed user base, more... ▸ Words similar to user base ▸ Usage examples for user base ▸ Idioms related to user base ▸ Wikipedia articles (New!) ▸ Words that often appear near user base ▸ Rhymes of user base ▸ Invented words related to user base