* Borrowed from English: "Shasta" is an English word that refers to Mount Shasta, a volcano in California. It could be used in German as a loanword, particularly in contexts related to geography or travel.
* Proper noun: "Shasta" could be a person's name, perhaps borrowed from English or from a different language.
* Misspelling: It could be a misspelling of another German word.
If you have more context about where you encountered the word "Shasta" in German, it might be easier to determine its meaning.