noun
knocking
NO-kihng
noun
1
A repeated rapping sound, such as on a door.
"There was a loud knocking at the window in the middle of the night."
2
A rattling or pinging sound from an engine caused by fuel igniting unevenly.
"A persistent knocking from the engine suggested the fuel was the wrong grade."
How to Use Knocking
Learner’s notesIn plain EnglishThe sound of repeated knocks, whether on a door or from a faulty engine.
Common pairings
engine knocking
a knocking sound
Word Forms
knockings plural
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There was a loud _____ at the window in the middle of the night.