1. The primary residence where a person or family lives most of the time, as opposed to vacation homes or secondary properties
We sold our main home and bought a smaller apartment in the city.
Vendemos nossa residência principal e compramos um apartamento menor na cidade.
2. In legal or tax contexts, the dwelling that is designated as one's principal place of residence
For tax purposes, you must declare your main home address.
Para fins fiscais, você deve declarar o endereço de sua residência principal.