knock meaning and definition

KNOCK noun

Definition of knock (noun)

1. the sound of knocking (as on a door or in an engine or bearing)
   • "the knocking grew louder"
   • synonyms: knocking
2. negative criticism
   • synonyms: roast
3. a vigorous blow
   • "the sudden knock floored him"; "he took a bash right in his face"; "he got a bang on the head"
   • synonyms: bang, bash, belt, smash
4. a bad experience
   • "the school of hard knocks"
5. the act of hitting vigorously
   • "he gave the table a whack"
   • synonyms: belt, rap, whack, whang

KNOCK verb

Definition of knock (verb)

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