This is the 10888th most frequent German word.
sandersdorf
"Sandersdorf" is a proper noun and refers to a town in Germany; it does not have a standalone definition in English.
In this sentence, "Sandersdorf" is used as a proper noun, specifically a place name.
Sandersdorf ist eine Stadt in Deutschland.
Sandersdorf is a city in Germany.
Here, "Sandersdorf" is again a proper noun serving as the direct object of the verb "besuchten."
Sie besuchten Sandersdorf, um Verwandte zu treffen.
They visited Sandersdorf to meet relatives.
In this example, "Sandersdorf" specifies the location, underlining its usage as a geographical name.