Examples of “knocking” in a Sentence

noun A repeated rapping sound, such as on a door.

• The knocking on the front door woke the baby just after dinner.
• We could hear the steady knocking of a woodpecker somewhere in the forest.
• There was a loud knocking at the window in the middle of the night.

noun A rattling or pinging sound from an engine caused by fuel igniting unevenly.

• The mechanic said the knocking in the old engine meant it needed attention.
• I noticed some knocking when I accelerated up the hill, so I booked a service.
• A persistent knocking from the engine suggested the fuel was the wrong grade.