Noun

• S: (n) knock (knock%1:11:01::), knocking (knocking%1:11:00::) (the sound of knocking (as on a door or in an engine or bearing)) "the knocking grew louder"
• S: (n) knock (knock%1:09:00::), roast (roast%1:09:00::) (negative criticism)
• S: (n) knock (knock%1:11:00::), bash (bash%1:11:00::), bang (bang%1:11:01::), smash (smash%1:11:01::), belt (belt%1:11:00::) (a vigorous blow) "the sudden knock floored him"; "he took a bash right in his face"; "he got a bang on the head"
• S: (n) knock (knock%1:11:02::) (a bad experience) "the school of hard knocks"
• S: (n) knock (knock%1:04:00::), belt (belt%1:04:00::), rap (rap%1:04:00::), whack (whack%1:04:00::), whang (whang%1:04:00::) (the act of hitting vigorously) "he gave the table a whack"

Verb

• S: (v) knock (knock%2:35:04::), strike hard (strike_hard%2:35:00::) (deliver a sharp blow or push) "He knocked the glass clear across the room"
• S: (v) knock (knock%2:35:01::) (rap with the knuckles) "knock on the door"
• S: (v) bump (bump%2:35:00::), knock (knock%2:35:00::) (knock against with force or violence) "My car bumped into the tree"
• S: (v) tap (tap%2:39:01::), rap (rap%2:39:00::), knock (knock%2:39:00::), pink (pink%2:39:00::) (make light, repeated taps on a surface) "he was tapping his fingers on the table impatiently"
• S: (v) pink (pink%2:39:03::), ping (ping%2:39:01::), knock (knock%2:39:01::) (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"
• S: (v) knock (knock%2:32:02::), criticize (criticize%2:32:00::), criticise (criticise%2:32:00::), pick apart (pick_apart%2:32:00::) (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"