gemeldet
registered
Registered or officially signed up with an authority or official office.
Um hier wählen zu können, müssen Sie in dieser Stadt gemeldet sein.
In order to vote here, you must be registered in this city.

registered
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registered
Registered or officially signed up with an authority or official office.
Um hier wählen zu können, müssen Sie in dieser Stadt gemeldet sein.
In order to vote here, you must be registered in this city.

'Gemeldet' is the past participle of the verb 'melden' (to report/register). Here it is used like an adjective to describe a state: the state of being registered with an authority.
Jeder Bürger muss offiziell gemeldet sein.
Every citizen must be officially registered.
The construction is typically: person + 'sein' (to be) + place + 'gemeldet' (registered). The place is usually given with the preposition 'in' and the dative.
Sind Sie noch in Hamburg gemeldet?
Are you still registered in Hamburg?
This word is very important in Germany because of the 'Meldepflicht' (registration requirement). Anyone who moves must have their new address registered with an authority, the 'Einwohnermeldeamt' (residents' registration office).
Um ein Auto anzumelden, müssen Sie hier gemeldet sein.
In order to register a car, you must be registered here.
registered / noticed
'registriert' and 'gemeldet' can both mean that a person or thing is officially recorded. 'registriert' is more general and fits many systems, lists, or online services. 'gemeldet' is used especially when something is registered with an authority or official office, for example an address. The words can be confused because reporting or registering something with an authority often also leads to a registration. When it is about an authority or someone's place of residence, 'gemeldet' sounds more natural; for an account, course, or system, 'registriert' is often more suitable.

Seit Montag ist Maria in Berlin gemeldet.
Maria has been registered in Berlin since Monday.
Für den Online-Kurs ist der Lehrer bereits registriert.
The teacher is already registered for the online course.