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knock to rap, pound, or hit something, such as a door. [6 definitions]
knock down to make a person or object that had been standing fall to the ground.
knocker a metal piece with a hinge that is attached to the outside of a door. A knocker is used to call for those inside.
knoll a small rounded rise of land; hill.
knot1 a tying together of material such as rope, string, or yarn that is used to fasten. [6 definitions]
knothole a hole in a piece of lumber from which a knot has come out.
knotty having knots. [2 definitions]
know to perceive directly or have some information about something in your mind. [4 definitions]
know-how the knowledge needed to do a certain task.
knowledge understanding; awareness. [3 definitions]
knowledgeable having information or knowledge; familiar.
known past participle of know.
know of to be aware of; have heard about.
knuckle a joint of a finger.
knuckle down to start working in a serious manner.
koala a mammal with gray fur, round ears, and a short black nose. Koalas are marsupials and live in trees. The female has a pouch in her belly where she carries her baby. Koalas are only found in Australia. They are sometimes called "koala bears," but they are not related to true bears.
kook (slang) a person considered to be strange or crazy.
Koran the sacred book of Islam that is the basis of Muslim religion. Muslims believe that Allah gave the words of the Koran to the prophet Muhammad. The Koran is written in Arabic.
Korea see North Korea, South Korea.
Korean of or having to do with the people, culture, or language of North and South Korea. [2 definitions]
kosher prepared according to Jewish laws of food. [2 definitions]