ADJ [ADJ n]拥有（或包括）大量土地的；（尤指）有大量世袭土地的Landed means owning or including a large amount of land, especially land that has belonged to the same family for several generations. 拥有（或包括）大量土地的；（尤指）有大量世袭土地的
Most of them were the nobility and the landed gentry.
他们大多是贵族和地主乡绅。
...the erosion of the aristocracy's landed wealth.