king ‧ dom /ˈkɪŋdəm/ BrE AmE noun [countable]
1 . a country ruled by a king or queen:
the United Kingdom
kingdom of
the kingdom of Thailand
2 . the animal/plant/mineral kingdom one of the three parts into which the natural world is divided
3 . the kingdom of heaven/God ( also God’s kingdom ) heaven
4 . kingdom come informal a phrase used to describe the end of the world, death, or the end of time:
He left the gas on and nearly blew us all to kingdom come.