sup ‧ pos ‧ ed ‧ ly /səˈpəʊzədli, səˈpəʊzɪdli $ -ˈpoʊ-/ BrE AmE adverb
[ Word Family: verb : ↑ suppose , ↑ presuppose ; noun : ↑ supposition , ↑ presupposition ; adverb : ↑ supposedly ; adjective : ↑ supposed ]
used when saying what many people say or believe is true, especially when you disagree with them:
How could a supposedly intelligent person be so stupid?
[sentence adverb]
Anne is coming for a visit in March, supposedly.