1. The sound of knocking (as on a door or in an engine or bearing)
   "the knocking grew louder";
   - knock

1. Rap with the knuckles
   "knock on the door"
    
2. Deliver a sharp blow or push
   "He knocked the glass clear across the room"; "The boxer struck hard, knocking out his opponent";
   - strike hard
    
3. Make light, repeated taps on a surface
   "he was knocking his fingers on the table impatiently";
   - tap, rap, pink
    
4. Collide with force or violence
   "My car knocked into the tree";
   - bump
    
5. Sound like a car engine that is firing too early
   "The car knocked when the ignition was too far retarded";
   - pink, ping [US]
    
6. [informal] Find fault with; express criticism of; point out real or perceived flaws
   "Don't knock the food — it's free";
   - criticize, criticise [Brit], pick apart, damn [informal]

Sounds like: knocked, nocking, noc

Derived forms: knockings

See also: batter, butt against, kayo [informal], tip over

Type of: collide with, comment, go, hit, impact, impinge on, knap [archaic], notice, point out, rap, remark, run into, sound, strike

Encyclopedia: Knocking