This is the 176th most frequent German word.
nächsten
"Next" or "nearest."
In this sentence, 'nächsten' modifies 'Sonntag' and is used to indicate the Sunday occurring directly following the current date.
Ich werde nächsten Sonntag deine Familie besuchen.
I will visit your family next Sunday.
Here, 'nächsten' describes 'Schritte' to denote steps that occur sequentially following the current step or stage.
Die nächsten Schritte sind sehr wichtig für das Projekt.
The next steps are very important for the project.
In this instance, 'nächsten' is used as an adjective for 'Raum' to indicate the room directly adjacent or following the current location.