realm
/relm/noun
1- archaic, poetic/literary, or Law a kingdom〈古, 诗/文〉【律】王国; 国度：
the peers of the realm
王国的贵族
the defence of the realm.
王国的防卫。
1.1
- a field or domain of activity or interest界, 领域; 范围：
the realm of applied chemistry
应用化学领域
it is beyond the realms of possibility.
这超出了可能的范围。
1.2
- Zoology a primary biogeographical division of the earth's surface【动】界（对地球表面所作的最主要的生物地理划分）。
词源
Middle English rewme, from Old French reaume, from Latin regimen 'government' （see REGIMEN）. The spelling with -l- （standard from c.1600） was influenced by Old French reiel 'royal'.