This is the 638th most frequent German word.
reihe
"Reihe" means "row," "line," "series," or "sequence" in English.
In this sentence, 'Reihe' refers to the concept of an order or sequence, specifically one's turn in that order.
Ich wartete geduldig, bis ich an der Reihe war.
I waited patiently until it was my turn.
In this instance, 'Reihe' denotes a series, implying a collection of related items, such as novels in a sequence.
Dieses Buch gehört zu einer ganzen Reihe historischer Romane.
This book belongs to an entire series of historical novels.
Here, 'Reihe' represents a physical arrangement of items in a line, like the books on a shelf.