This is the 2470th most frequent German word.
single
A person who is not in a romantic relationship.
In this sentence, 'single' is used as an adjective to describe a person's relationship status, meaning not romantically involved.
Ich bin derzeit single und genieße meine Freizeit.
I am currently single and enjoying my free time.
Here, 'Single' is used as a noun referring to a single music release, typically one song.
Er hörte sich den neuesten Single seiner Lieblingsband an.
He listened to the latest single from his favorite band.
In this example, 'einzelne' translates to 'single' in English and is used to describe something suitable for one person.