We found 2 dictionaries that define the word non-mainstream:

General (1 matching dictionary)

1. non-mainstream: Wordnik

Slang (1 matching dictionary)

2. non-mainstream: Urban Dictionary

▸ Words similar to non-mainstream ▸ Usage examples for non-mainstream ▸ Idioms related to non-mainstream ▸ Wikipedia articles (New!) ▸ Words that often appear near non-mainstream ▸ Rhymes of non-mainstream ▸ Invented words related to non-mainstream