n.[C]

1. 【書】王國；國土，領土
   The king sought to expand his realm.

   國王謀求擴大領土。

2. 界，領域；範圍[P1][（+of）]
   He made outstanding contributions in the realm of foreign affairs.

   他在外交領域作出了卓越貢獻。

n.

1. archaic, literary, or Law  a kingdom.
2. a field or area of activity or interest:
   the realm of chemistry.