knocking Meaning, Definition & Usage

1. noun the sound of knocking (as on a door or in an engine or bearing)
   knock.
   
   • the knocking grew louder
2. verb deliver a sharp blow or push :"He knocked the glass clear across the room"
   knock; strike hard.
   
3. verb rap with the knuckles
   knock.
   
   • knock on the door
4. verb knock against with force or violence
   bump; knock.
   
   • My car bumped into the tree
5. verb make light, repeated taps on a surface
   pink; knock; tap; rap.
   
   • he was tapping his fingers on the table impatiently
6. verb sound like a car engine that is firing too early
   pink; knock; ping.
   
   • the car pinged when I put in low-octane gasoline
   • The car pinked when the ignition was too far retarded
7. verb find fault with; express criticism of; point out real or perceived flaws
   criticise; knock; pick apart; criticize.
   
   • The paper criticized the new movie
   • Don't knock the food--it's free

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