The meaning of KNOCK is to strike something with a sharp blow. How to use knock in a sentence.

In spark-ignition internal combustion engines, knocking (also called knock, detonation, spark knock, or pinging) occurs when combustion of some of the air/fuel mixture in the cylinder results from a source …

KNOCKING definition: the sound or action of a knock, especially when sustained or repeated. See examples of knocking used in a sentence.

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1. To strike a sharp audible blow or series of blows, as on a door. 2. To collide with something: knocked into the table. 3. To make a pounding or clanking noise: The car engine is knocking.

If an engine is knocking, it is producing a repeated high sound either because the fuel is not burning correctly or because a small part is damaged and is therefore allowing another part to move in ways …

They heard furious knocking coming from downstairs. There was a loud knocking. They were wakened by a loud knocking at the door. 2. There was a knocking coming from under the bonnet. Collins …

Knocking is the action of hitting a surface, typically in a series of audible impacts, often with the intention of gaining attention or alerting someone of your presence.

Feb 9, 2026 · Learn what engine knocking sounds like, common causes, how to diagnose it, repair costs, and when engine replacement is needed. Full expert guide inside.

Aug 7, 2023 · Engine knocking can be caused by several different things, but a few suspects occur more than others. The following are six of the most likely causes of engine knocking and why …