1.Definition: a bad experience

"The school of hard knocks"

Category: General

2.Definition: a vigorous blow

"The sudden knock floored him", "He took a bash right in his face", "He got a bang on the head"

Related Noun(s):bang, bash, belt, smash

Category: General

3.Definition: negative criticism

Related Noun(s):roast

Category: General

4.Definition: the act of hitting vigorously

Related Noun(s):belt, rap, whack, whang

Category: General

5.Definition: the sound of knocking (as on a door or in an engine or bearing)

"The knocking grew louder"

Related Noun(s):knocking

Category: General