knock Meaning and Definition

1. n. the act of hitting vigorously

2. n. negative criticism

3. n. a bad experience

4. n. the sound of knocking (as on a door or in an engine or bearing)

5. n. a vigorous blow

6. v. find fault with; express criticism of; point out real or perceived flaws

7. v. deliver a sharp blow or push :

8. v. knock against with force or violence

9. v. rap with the knuckles

10. v. sound like a car engine that is firing too early

11. v. make light, repeated taps on a surface