This is the 319th most frequent Norwegian word.
deretter
"Deretter" means "after that" or "thereafter" in English.
Here, 'deretter' is used to indicate a sequential action following the previous one.
Jeg tok en kopp kaffe, og deretter begynte jeg å lese en bok.
I had a cup of coffee, and thereafter I started reading a book.
In this sentence, 'deretter' signifies a subsequent action in a series of planned events.
Først finner vi fram kartet, og deretter planlegger vi ruten.
First, we find the map, and thereafter we plan the route.
'Deretter' here is used to show the continuity of events in a timeline.