Meaning of “supposed” - Learner’s Dictionary

supposed

adjective [ always before noun ] uk us /səˈpəʊzd/

used to show that you do not believe that someone or something really is what many people consider them to be:

a supposed genius
supposedly uk us /səˈpəʊzɪdli/ adverb

The building is supposedly in good condition.

(Definition of “supposed” from the Cambridge Learner’s Dictionary © Cambridge University Press)