1. a large ornamental carp, typically brightly colored, kept in ponds and water gardens

Examples

• The koi in the garden pond were bright orange and white.
• She fed the koi every morning at sunrise.
• The Japanese koi can live for over 100 years.
• Large koi swam gracefully beneath the lily pads.
• The restaurant’s entrance featured a beautiful koi pond.
• He collected rare varieties of koi for his backyard water garden.