0 someone who lives very near you, especially in the next house -- 近所の人
Our next-door neighbours are always arguing.
1 someone or something that is near or next to someone or something else -- 隣(近く)にあるもの、人
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
道路がどれだけ長くても、一歩一歩完了することができますし、足跡をマークしなければ、道路がどんなに短くても完了することはできません。