General Definition:
1. The action of going from one place or entity to another place or entity which is considered to be beside or nearby the first in space (or time), or any thing or any action directly or indirectly associated with this, especially a neighbouring house.
As a Noun:
1. The people who live near you, especially the people who live in a house which is immediately beside yours. English = neighbour.
2. The house of the people who live immediately beside your house. English = the place next door, next door.
As a Verb or Adjective:
1. To live or be located near where you live, especially in a house which is immediately beside yours. English = (be) next door to, (be) a neighbour to.