We found one dictionary that defines the word on the supposition that:

General (1 matching dictionary)

1. on the supposition that: Merriam-Webster

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