kite noun A light frame covered with fabric or plastic, flown in the wind on a string. The children ran along the beach trying to get their kite off the ground. + king noun A male monarch who rules a country or kingdom, typically inheriting the position by birth. The king addressed the nation from the palace balcony after the coronation ceremony ended. + key noun A small metal device shaped to open a lock, start an engine, or operate a mechanism. She fumbled in her bag looking for the key to the front door. + kid noun A child or young person, informally. The kids raced each other across the playground during morning recess. + kitten noun A young domestic cat, especially one still dependent on its mother. The kitten chased a ball of yarn across the living room floor. + kangaroo noun A large Australian marsupial that hops on powerful hind legs and carries its young in a pouch. A kangaroo bounded across the outback road as our car slowed down. + koala noun A tree-dwelling Australian marsupial with thick gray fur that feeds almost entirely on eucalyptus leaves. The koala clung sleepily to a branch high in the eucalyptus tree. + kitchen noun A room or area equipped for preparing and cooking food. We spent the afternoon baking cookies together in my grandmother's kitchen. + kick verb To strike, push, or propel something forcefully using the foot or leg. The striker kicked the ball hard into the top corner of the net. + kind adjective Having or showing a friendly, generous, and considerate nature toward others. It was kind of him to help the elderly neighbor carry her groceries. + kiss verb To touch someone with the lips as a sign of affection, greeting, or desire. She kissed her grandmother goodbye before boarding the train home yesterday. + knee noun The joint connecting the thigh and the lower leg, allowing the leg to bend. He scraped his knee badly after falling off his bicycle. + knot noun A fastening made by looping and tightening a piece of rope, string, or thread. He tied a tight knot to secure the boat to the dock. + knight noun A medieval warrior of noble rank who served a king or lord, typically fighting on horseback. The knight pledged his loyalty to the king before riding into battle. + knife noun A tool or weapon with a sharp blade fixed in a handle, used for cutting. She sliced the bread with a serrated knife from the kitchen drawer. + knock verb To strike a surface, especially a door, with sharp blows to attract attention. Someone knocked on the door just as we sat down for dinner. + know verb To have information, understanding, or awareness of something through experience, learning, or being told. She has known her best friend since they were both in kindergarten. + kayak noun A small, narrow boat propelled with a double-bladed paddle, originally used by Arctic peoples. We rented a kayak to paddle along the calm edge of the lake. + keyboard noun A set of keys used to operate a computer, typewriter, or musical instrument. He typed the report quickly on his laptop's keyboard before the deadline. + kernel noun The softer, often edible part inside the shell of a nut or the husk of a seed. She picked out each popcorn kernel that hadn't fully popped. + ketchup noun A thick, tangy sauce made mainly from tomatoes, vinegar, and sugar, used as a condiment. He squeezed ketchup over his fries before taking the first bite. + kettle noun A container, often with a spout and handle, used for boiling water on a stove or electrically. She put the kettle on as soon as her guests arrived for tea. + kingdom noun A country or territory ruled by a king or queen, or, more broadly, a distinct realm or domain. The kingdom was ruled by the same royal family for over five centuries. + kindness noun The quality of being friendly, generous, and considerate toward others. Her kindness toward strangers made a lasting impression on everyone she met. + kilometer noun A unit of length in the metric system equal to one thousand meters, about 0.62 miles. The nearest town is about five kilometers from our farmhouse. + karate noun A Japanese martial art using quick, sharp strikes with the hands, elbows, feet, and knees. He has practiced karate since childhood and now holds a black belt. + kindergarten noun A school class or program for young children, typically ages four to six, that precedes first grade. She felt nervous on her first day of kindergarten but made a friend by lunchtime. + keeper noun A person who guards, looks after, or maintains something, such as animals or a place. The zoo's keeper fed the elephants the same time every morning. + kayaking noun The sport or activity of paddling and traveling in a kayak, usually on rivers, lakes, or the sea. Kayaking down the river gave us a close view of the herons along the bank. + kilogram noun A metric unit of mass equal to one thousand grams, the base unit of mass in the International System of Units. The recipe calls for half a kilogram of flour and two eggs. +