Englishfor English speakers
ein Generationswechsel an der Staatsspitze
an
Determinative
—
An (or a) is used when the following word could be any of a certain type.
I just ate an apple.
It is indeed an honor to have met you today.
der
interjection
—
(Australian) Disdainful indication that something is obvious.
—
(Australian) Indication of stupidity.