How to use knock in a sentence. To repeatedly hit something, producing a noise If an engine is knocking, it is producing a… To strike a sounding blow with the fist, knuckles, or anything hard, especially on a door, window, or the like, as in seeking admittance, calling attention, or giving a signal. If you knock something or someone, you criticize them and say unpleasant things about them. Often used in the imperative
He asked us to knock it off. Forty years after its founding, ireland west airport knock is thriving — a living monument to monsignor james horan, whose improbable vision helped transform a rural dream into a regional. Knock noun [c] (noise) a sudden short noise made when something or someone hits a surface A knock at/on the door To hit a door with your closed hand so that people know you are there
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