knock

1. v. i. To drive or be driven against something; to strike against something; to clash; as, one heavy body knocks against another. Source: opted

2. v. i. To strike or beat with something hard or heavy; to rap; as, to knock with a club; to knock on the door. Source: opted

3. v. t. To strike with something hard or heavy; to move by striking; to drive (a thing) against something; as, to knock a ball with a bat; to knock the head against a post; to knock a lamp off the table. Source: opted

4. v. t. To strike for admittance; to rap upon, as a door. Source: opted

5. n. A blow; a stroke with something hard or heavy; a jar. Source: opted

6. n. A stroke, as on a door for admittance; a rap. Source: opted

7. n. the sound of knocking (as on a door or in an engine or bearing) Source: wordnet

8. n. negative criticism Source: wordnet

9. n. a vigorous blow Source: wordnet

10. n. a bad experience Source: wordnet

11. n. the act of hitting vigorously Source: wordnet

12. v. deliver a sharp blow or push Source: wordnet

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