We found 3 dictionaries that define the word be on a collision course:

General (2 matching dictionaries)

1. be on a collision course: Cambridge Advanced Learner's Dictionary
2. be on a collision course: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

3. be on a collision course: Idioms

▸ Words similar to be on a collision course ▸ Usage examples for be on a collision course ▸ Idioms related to be on a collision course ▸ Wikipedia articles (New!) ▸ Words that often appear near be on a collision course ▸ Rhymes of be on a collision course ▸ Invented words related to be on a collision course