1. a country ruled by a king or queen
2. a major category in the classification of living things
Usage: biology
3. an area or sphere of activity dominated by a particular person or thing

Examples

• The United Kingdom is a constitutional monarchy.
• The kingdom was ruled by a wise and just queen.
• Animals belong to the animal kingdom in biological classification.
• Plants and fungi are separate kingdoms in taxonomy.
• The kitchen was her kingdom where she created amazing meals.
• He built a business kingdom that spanned multiple industries.
• The lion is often called the king of the animal kingdom.