kingdom                
noun [ C ] uk/ˈkɪŋ.dəm/ us/ˈkɪŋ.dəm/
B2 王国
a country ruled by a king or queen
  the United Kingdom of Great Britain and Northern Ireland 大不列颠及北爱尔兰联合王国 
  (某人)占统治地位的地方;管辖范围;(某种特质为重的)领域
an area that is controlled by a particular person or where a particular quality is important
  the kingdom of God/Heaven 天国 
 the kingdom of love 爱的王国 
  literary活动领域 
an area of activity
  the kingdom of the theatre 戏剧王国 
 the kingdoms of the mind 思想领域 
 C2 (动物、植物、矿物)界
one of the groups that natural things can be divided into, depending on their type
  the animal/plant kingdom 动物/植物界 
 - More examples
 - a feudal lord/kingdom/society
 - He ruled the kingdom wisely.
 - They visited many kingdoms of the East.
 - Her kingdom stretched for thousands of miles.
 - Who is the ruler of this kingdom?
 
Idioms      
blast/blow someone/something to kingdom comeidiom  彻底炸毁;(用炮弹)送…上西天
to destroy someone or something completely using a gun or bomb
  The bombs are capable of blasting a whole city to kingdom come. 这些炸弹能将整座城市完全摧毁。 
 till/until kingdom comeidiom  无休止地
for ever
  I don't want to have to wait till kingdom come for you to make up your mind. 我可不想无休止地等你下决心。