1. plural of killie; small fish of the killifish family, often kept in aquariums
Usage: informal; often used by aquarium hobbyists
2. plural of killie; a type of low shoe with a slit across the instep, traditionally worn in Scotland
Usage: chiefly Scottish

Examples

• She keeps a tank of colorful killies in her living room.
• The aquarium store had several varieties of killies for sale.
• He wore traditional killies with his kilt to the Highland games.
• Killies are popular among beginner aquarists because they are hardy.
• The shop specializes in rare killies from Africa and South America.