- karaoke club A lounge or bar where customers take turns singing along with recorded music.
- kart racing A place for racing miniature open-wheel motorcars.
- key A coded string used to relate objects with corresponding objects in a database.
- khaki A dull shade of light brown with a slight tint of gray.
- kilometer marker The position of an object along a route which is officially measured in kilometers.
- kindergarten Educational space for children about 5 years old, before enrolling in primary school.
- kiosk A small shop where the goods for sale are kept close to a single sales desk.
- kitchen furnishings manufacturer A company which sells kitchen installations to be used throughout a building.
- kitchenettes Spaces for food preparation and consumption in a place where kitchens are not regularly included.
- kitchenware store Retail space specializing in dishes, glasses, cookware, utensils, and/or appliances for food handling.
- korean format Addresses written in the South Korean format, incorporating a numeric house number in combination with text locators.
- korean restaurant A restaurant specializing in Korean cuisine.