n.[C]

1. 【书】王国；国土，领土
   The king sought to expand his realm.

   国王谋求扩大领土。

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

   他在外交领域作出了卓越贡献。

n.

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