pre ‧ sup ‧ pose /ˌpriːsəˈpəʊz $ -ˈpoʊz/ BrE AmE verb [transitive] formal
[ Word Family: verb : ↑ suppose , ↑ presuppose ; noun : ↑ supposition , ↑ presupposition ; adverb : ↑ supposedly ; adjective : ↑ supposed ]
1 . to depend on something that is believed to exist or to be true SYN assume :
The idea of heaven presupposes the existence of God.
presuppose that
Your argument presupposes that Dickens was a social reformer.
2 . to have to happen if something is true:
Without struggle there can be no progress, and struggle presupposes winners and losers.