Next; following; the thing that comes after in order (often used as 'the next ~').
次の電車は何時に来ますか？
What time does the next train arrive?
次は私が払います。
I'll pay next (time).
この本の次の章を読んでください。
Please read the next chapter of this book.
A stage or station — the next phase or point in a sequence (e.g., the next stage or next station).
計画は順調に進み、次の段階に移ることになった。
The plan is progressing well and will move on to the next stage.
次の駅で降りる準備をしてください。
Please get ready to get off at the next station.
イベントはこれで一区切り。次は懇親会です。
This concludes this part of the event. Next is the social gathering.