Definitions:

1. a bad experience noun
   • the school of hard knocks
2. a vigorous blow noun
   • the sudden knock floored him
3. rap with the knuckles verb
   • knock on the door
4. the sound of knocking (as on a door or in an engine or bearing) noun
   • the knocking grew louder

Synonyms:

• bang
• bash
• belt
• bump
• criticise
• criticize
• knocking
• pick apart
• ping
• pink
• rap
• roast
• smash
• strike hard
• tap
• whack
• whang

NearBy Words:

• knock-down
• knock-down
• knock-down-and-drag-out
• knock-knee
• knock-kneed
• knockabout
• knockdown
• knockdown-dragout
• knocked-out
• knocker
• knocking
• knockoff
• knockout
• knockwurst