We found one dictionary that defines the word happened before:

General (1 matching dictionary)

1. Happened-before: Wikipedia, the Free Encyclopedia

Phrases: something that happened before, the feeling that this happened before, never happened before, happened before me, thing that happened before, more... ▸ Words similar to happened before ▸ Usage examples for happened before ▸ Idioms related to happened before ▸ Wikipedia articles (New!) ▸ Words that often appear near happened before ▸ Rhymes of happened before ▸ Invented words related to happened before