An estate is a large area of land in the country which is owned by a person or organization. It usually has a large house on it. It is the modern word for a "mansion".
Image source: Lillian Farms Country Estate
1. The ownership interest one has in real property.
2. The property left by a deceased person.
3. A large house with substantial grounds surrounding it, giving the impression of belonging to a wealthy person.
All the money and property that is left behind at death.
In her will, she left her estate to her two grandsons.