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]

1. The sound of knocking (as on a door or in an engine or bearing)
   "the knock grew louder";
   - knocking
    
2. The act of hitting vigorously
   "he gave the table a knock";
   - belt [informal], rap, whack [informal], whang [informal]
    
3. A vigorous blow
   "the sudden knock floored him";
   - bash [informal], bang, smash, belt [informal], sock [informal]
    
4. A bad experience
   "the school of hard knocks"
    
5. Negative criticism
   "The politician couldn't handle the constant knocks from the opposition";
   - roast [informal]

Sounds like: knobby, nonock

Derived forms: knocked, knocks, knocking

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

Type of: bad luck, blow, bump, collide with, comment, crit [informal], criticism, critique, go, hit, impact, impinge on, knap [archaic], misfortune, notice, point out, rap, remark, run into, sound, strike

Encyclopedia: Knock, Knock Ginger